qemu: monitor: @running in qemuMonitorGetStatus is always non-NULL

Add the attribute and remove the check.

src/qemu/qemu_monitor.c

@@ -1586,9 +1586,9 @@ qemuMonitorGetStatus(qemuMonitorPtr mon,
 {
     VIR_DEBUG("mon=%p, running=%p, reason=%p", mon, running, reason);
 
-    if (!mon || !running) {
+    if (!mon) {
         virReportError(VIR_ERR_INVALID_ARG, "%s",
-                       _("both monitor and running must not be NULL"));
+                       _("monitor must not be NULL"));
         return -1;
     }
 

src/qemu/qemu_monitor.h

@@ -335,7 +335,8 @@ int qemuMonitorVMStatusToPausedReason(const char *status);
 
 int qemuMonitorGetStatus(qemuMonitorPtr mon,
                          bool *running,
-                         virDomainPausedReason *reason);
+                         virDomainPausedReason *reason)
+    ATTRIBUTE_NONNULL(2);
 
 int qemuMonitorSystemReset(qemuMonitorPtr mon);
 int qemuMonitorSystemPowerdown(qemuMonitorPtr mon);