Adding zero check on a char pointer before sending it to printf.

modules/plugin/base/src/nsPluginHostImpl.cpp

@@ -1508,6 +1508,7 @@ NS_IMETHODIMP nsPluginHostImpl::InstantiateEmbededPlugin(const char *aMimeType,
   nsIPluginInstance *instance = nsnull;
 
 #ifdef NS_DEBUG
+  if(!aMimeType)
     printf("InstantiateEmbededPlugin for %s\n",aMimeType);
 #endif
 

modules/plugin/nglsrc/nsPluginHostImpl.cpp

@@ -1508,6 +1508,7 @@ NS_IMETHODIMP nsPluginHostImpl::InstantiateEmbededPlugin(const char *aMimeType,
   nsIPluginInstance *instance = nsnull;
 
 #ifdef NS_DEBUG
+  if(!aMimeType)
     printf("InstantiateEmbededPlugin for %s\n",aMimeType);
 #endif