Fix T78080: group node has incorrect sockets after changing group

It was only checking for the identifier, but the type has to be equivalent as well.

Reviewers: mano-wii, brecht

Differential Revision: https://developer.blender.org/D8101

source/blender/nodes/intern/node_common.c

@@ -125,7 +125,7 @@ static bNodeSocket *group_verify_socket(
   bNodeSocket *sock;
 
   for (sock = verify_lb->first; sock; sock = sock->next) {
-    if (STREQ(sock->identifier, iosock->identifier)) {
+    if (sock->typeinfo == iosock->typeinfo && STREQ(sock->identifier, iosock->identifier)) {
       break;
     }
   }