[Bf-blender-cvs] [96447402309] blender-v3.3-release: Fix T99949: Crash when last input from File Output node is deleted

[Sergey Sharybin]

Commit: 96447402309ae79bdca92a0c40c49a4861596081
Author: Sergey Sharybin
Date:   Tue Aug 9 16:44:36 2022 +0200
Branches: blender-v3.3-release
https://developer.blender.org/rB96447402309ae79bdca92a0c40c49a4861596081

Fix T99949: Crash when last input from File Output node is deleted

Regression since e4278b72bb1a.

Need to check inputs exist prior to requesting first input as it
might not exist.

===================================================================

M	source/blender/compositor/nodes/COM_OutputFileNode.cc

===================================================================

diff --git a/source/blender/compositor/nodes/COM_OutputFileNode.cc b/source/blender/compositor/nodes/COM_OutputFileNode.cc
index f69511d88e6..a62d21bb657 100644
--- a/source/blender/compositor/nodes/COM_OutputFileNode.cc
+++ b/source/blender/compositor/nodes/COM_OutputFileNode.cc
@@ -37,6 +37,10 @@ void OutputFileNode::map_input_sockets(NodeConverter &converter,
 
 void OutputFileNode::add_preview_to_first_linked_input(NodeConverter &converter) const
 {
+  if (get_input_sockets().is_empty()) {
+    return;
+  }
+
   NodeInput *first_socket = this->get_input_socket(0);
   if (first_socket->is_linked()) {
     converter.add_node_input_preview(first_socket);