Fixed memory leaks in PHP extension code
diff --git a/src/php/ext/grpc/channel.c b/src/php/ext/grpc/channel.c
index 51a3eae..b8262db 100644
--- a/src/php/ext/grpc/channel.c
+++ b/src/php/ext/grpc/channel.c
@@ -62,6 +62,7 @@
   if (channel->wrapped != NULL) {
     grpc_channel_destroy(channel->wrapped);
   }
+  efree(channel->target);
   efree(channel);
 }