Fix memory leak while loading priority modules and adding formats

This patch fixes two memory leaks:
 * When we load a module with the LOAD_PRIORITY flag, we remove its entry from
   the load order list. Unfortunately, we don't free the memory associated with
   entry in the list. This patch corrects that and properly frees the memory
   for the module in the list.

 * When adding a custom format (such as SILK or CELT), the routine for adding
   the format was leaking a reference. RAII_VAR cleans this up properly.

........

Merged revisions 391489 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@391507 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/format.c

@@ -916,7 +916,7 @@ int init_framer(void)
 
 static int format_list_add_custom(struct ast_format_list *new)
 {
-	struct ast_format_list *entry;
+	RAII_VAR(struct ast_format_list *, entry, NULL, ao2_cleanup);
 	if (!(entry = ao2_alloc(sizeof(*entry), NULL))) {
 		return -1;
 	}

main/loader.c

@@ -1035,6 +1035,8 @@ static int load_resource_list(struct load_order *load_order, unsigned int global
 			break;
 		case AST_MODULE_LOAD_PRIORITY:
 			AST_LIST_REMOVE_CURRENT(entry);
+			ast_free(order->resource);
+			ast_free(order);
 			break;
 		}
 	}