vl.c: change 'defconfig' variable to bool (v2)

Changes v1 -> v2:
 - Actually change the variable type declaration to 'bool'
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

vl.c

@@ -2283,7 +2283,7 @@ int main(int argc, char **argv, char **envp)
 #ifdef CONFIG_VNC
     int show_vnc_port = 0;
 #endif
-    int defconfig = 1;
+    bool defconfig = true;
     const char *log_mask = NULL;
     const char *log_file = NULL;
     GMemVTable mem_trace = {
@@ -2350,7 +2350,7 @@ int main(int argc, char **argv, char **envp)
             popt = lookup_opt(argc, argv, &optarg, &optind);
             switch (popt->index) {
             case QEMU_OPTION_nodefconfig:
-                defconfig=0;
+                defconfig = false;
                 break;
             }
         }