Bugfix #26221

Two bugs in one:

- Lukas commit monday for new group/socket handling accidentally removed
  to set socketype in stacks, which as used by (texture) nodes to detect
  whether value, color or vector had to be read.
  Result was that all texture nodes were rendering as B&W

- Old 2.5 bug: preview renders for texture nodes didn't call a 
  NodeEndExec function, which gave crashes on deleting nodes.

The change in interface_hanlers.c is only a comment to explain
how keymaps are being found.

1 files changed, 8 insertions, 1 deletions

diff --git a/source/blender/blenkernel/intern/node.c b/source/blender/blenkernel/intern/node.c
index 15ad3a7809a..320bead1c61 100644
--- a/source/blender/blenkernel/intern/node.c
+++ b/source/blender/blenkernel/intern/node.c
@@ -2318,8 +2318,15 @@ void ntreeBeginExecTree(bNodeTree *ntree)
 
 			for(sock= node->inputs.first; sock; sock= sock->next) {
 				ns = get_socket_stack(ntree->stack, sock, NULL);
-				if (ns)
+				if (ns) {
 					ns->hasoutput = 1;
+					
+					/* sock type is needed to detect rgba or value or vector types */
+					if(sock->link)
+						ns->sockettype= sock->link->fromsock->type;
+					else
+						sock->ns.sockettype= sock->type;
+				}
 				
 				if(sock->link) {
 					bNodeLink *link= sock->link;