Fix crash when liquify transform is started too quickly

dimula73 · dimula73 · commit e6e9fea57bc9 · 2019-09-09T18:28:59.000+03:00
Basically, we shouldn't initiate any transform action until
the transform strategy has finished preparing tool initialization
(which is flagged by setting m_transform.rootNode()).

All user actions happened before the initialization should be
ignored (he doesn't have any feedback anyway).

BUG:411703
diff --git a/plugins/tools/tool_transform2/kis_tool_transform.cc b/plugins/tools/tool_transform2/kis_tool_transform.cc
@@ -281,7 +281,7 @@ void KisToolTransform::beginActionImpl(KoPointerEvent *event, bool usePrimaryAct
 
     if (!m_strokeId) {
         startStroke(m_currentArgs.mode(), false);
-    } else {
+    } else if (m_transaction.rootNode()) {
         bool result = false;
 
         if (usePrimaryAction) {
