maint: avoid static zero init in helpers

C guarantees that static variables are zero-initialized.  Some older
compilers (and also gcc -fno-zero-initialized-in-bss) create larger
binaries if you explicitly zero-initialize a static variable.

* src/conf/nwfilter_conf.c: Fix initialization.
* src/cpu/cpu_x86.c: Likewise.
* src/interface/interface_backend_netcf.c: Likewise.
* src/locking/lock_daemon.c: Likewise.
* src/locking/lock_driver_lockd.c: Likewise.
* src/locking/lock_driver_sanlock.c: Likewise.
* src/network/bridge_driver.c: Likewise.
* src/node_device/node_device_udev.c: Likewise.
* src/nwfilter/nwfilter_learnipaddr.c: Likewise.
* src/rpc/virnetserver.c: Likewise.
* src/security/security_selinux.c
(virSecuritySELinuxGenSecurityLabel): Likewise.
Signed-off-by: NEric Blake <eblake@redhat.com>

src/conf/nwfilter_conf.c

@@ -144,7 +144,7 @@ static const struct int_map chain_priorities[] = {
  * only one filter update allowed
  */
 static virRWLock updateLock;
-static bool initialized = false;
+static bool initialized;
 
 void
 virNWFilterReadLockFilterUpdates(void)

src/cpu/cpu_x86.c

@@ -92,7 +92,7 @@ struct x86_map {
     struct x86_feature *migrate_blockers;
 };
 
-static struct x86_map* virCPUx86Map = NULL;
+static struct x86_map* virCPUx86Map;
 int virCPUx86MapOnceInit(void);
 VIR_ONCE_GLOBAL_INIT(virCPUx86Map);
 

src/interface/interface_backend_netcf.c

@@ -63,7 +63,7 @@ virNetcfDriverStateOnceInit(void)
 
 VIR_ONCE_GLOBAL_INIT(virNetcfDriverState)
 
-static virNetcfDriverStatePtr driverState = NULL;
+static virNetcfDriverStatePtr driverState;
 
 
 static void

src/locking/lock_daemon.c

@@ -67,7 +67,7 @@ struct _virLockDaemon {
 
 virLockDaemonPtr lockDaemon = NULL;
 
-static bool execRestart = false;
+static bool execRestart;
 
 enum {
     VIR_LOCK_DAEMON_ERR_NONE = 0,

src/locking/lock_driver_lockd.c

 /*
  * lock_driver_lockd.c: A lock driver which locks nothing
  *
- * Copyright (C) 2010-2011 Red Hat, Inc.
+ * Copyright (C) 2010-2011, 2014 Red Hat, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -79,7 +79,7 @@ struct _virLockManagerLockDaemonDriver {
     char *scsiLockSpaceDir;
 };
 
-static virLockManagerLockDaemonDriverPtr driver = NULL;
+static virLockManagerLockDaemonDriverPtr driver;
 
 static int virLockManagerLockDaemonLoadConfig(const char *configFile)
 {

src/locking/lock_driver_sanlock.c

@@ -79,7 +79,7 @@ struct _virLockManagerSanlockDriver {
     gid_t group;
 };
 
-static virLockManagerSanlockDriver *driver = NULL;
+static virLockManagerSanlockDriver *driver;
 
 struct _virLockManagerSanlockPrivate {
     const char *vm_uri;

src/network/bridge_driver.c

@@ -126,7 +126,7 @@ static int networkUnplugBandwidth(virNetworkObjPtr net,
 static void networkNetworkObjTaint(virNetworkObjPtr net,
                                    virNetworkTaintFlags taint);
 
-static virNetworkDriverStatePtr driverState = NULL;
+static virNetworkDriverStatePtr driverState;
 
 static virNetworkObjPtr
 networkObjFromNetwork(virNetworkPtr net)

src/node_device/node_device_udev.c

@@ -56,7 +56,7 @@ struct _udevPrivate {
     bool privileged;
 };
 
-static virNodeDeviceDriverStatePtr driverState = NULL;
+static virNodeDeviceDriverStatePtr driverState;
 
 static int udevStrToLong_ull(char const *s,
                              char **end_ptr,

src/nwfilter/nwfilter_learnipaddr.c

@@ -134,7 +134,7 @@ struct _virNWFilterIfaceLock {
 };
 
 
-static bool threadsTerminate = false;
+static bool threadsTerminate;
 
 
 int

src/rpc/virnetserver.c

@@ -817,8 +817,8 @@ void virNetServerRemoveShutdownInhibition(virNetServerPtr srv)
 
 
 
-static sig_atomic_t sigErrors = 0;
-static int sigLastErrno = 0;
+static sig_atomic_t sigErrors;
+static int sigLastErrno;
 static int sigWrite = -1;
 
 static void

src/security/security_selinux.c

@@ -641,7 +641,7 @@ virSecuritySELinuxGenSecurityLabel(virSecurityManagerPtr mgr,
         if (!baselabel) {
             if (def->virtType == VIR_DOMAIN_VIRT_QEMU) {
                 if (data->alt_domain_context == NULL) {
-                    static bool warned = false;
+                    static bool warned;
                     if (!warned) {
                         VIR_WARN("SELinux policy does not define a domain type for QEMU TCG. "
                                  "Guest startup may be denied due to missing 'execmem' privilege "