Memory management review: match char-malloc/strdup-free, gchar-g_str*/g_free; set pointers to null after free; initialize fonts/backgrounds correctly when missing from config

git-svn-id: http://tint2.googlecode.com/svn/trunk@748 121b4492-b84c-0410-8b4c-0d4edfb3f3cc

src/util/timer.c

@@ -64,8 +64,8 @@ void stop_multi_timeout(timeout* t);
 
 void default_timeout()
 {
-	timeout_list = 0;
-	multi_timeouts = 0;
+	timeout_list = NULL;
+	multi_timeouts = NULL;
 }
 
 void cleanup_timeout()
@@ -79,7 +79,7 @@ void cleanup_timeout()
 	}
 	if (multi_timeouts) {
 		g_hash_table_destroy(multi_timeouts);
-		multi_timeouts = 0;
+		multi_timeouts = NULL;
 	}
 }