initialize the bridge result to 'no result', so that we can check for code paths that set it to AST_BRIDGE_COMPLETE inside the loop (thanks Oskar!)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@26849 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channel.c

@@ -3276,7 +3276,7 @@ static enum ast_bridge_result ast_generic_bridge(struct ast_channel *c0, struct
 	/* Copy voice back and forth between the two channels. */
 	struct ast_channel *cs[3];
 	struct ast_frame *f;
-	enum ast_bridge_result res = AST_BRIDGE_COMPLETE;
+	enum ast_bridge_result res = 0;
 	int o0nativeformats;
 	int o1nativeformats;
 	int watch_c0_dtmf;