Use glib for all allocations

- Removes need to check for malloc failure
- Removes need for NULL checks on free
- Adds checks for integer overflows
- Removes some extra memset calls
- Removes chance of mixing libc and glib malloc/free

src/common/chanopt.c

@@ -208,7 +208,7 @@ chanopt_find (char *network, char *channel, gboolean add_new)
 		return NULL;
 
 	/* allocate a new one */
-	co = g_malloc0 (sizeof (chanopt_in_memory));
+	co = g_new0 (chanopt_in_memory, 1);
 	co->channel = g_strdup (channel);
 	co->network = g_strdup (network);