Fixed uninitialized variable (leading to asserts in the docking branch). (#2376, #2371)
diff --git a/imgui_internal.h b/imgui_internal.h
index fa17283..a76c386 100644
--- a/imgui_internal.h
+++ b/imgui_internal.h
@@ -1037,6 +1037,8 @@
         DragDropAcceptFrameCount = -1;
         memset(DragDropPayloadBufLocal, 0, sizeof(DragDropPayloadBufLocal));
 
+        CurrentTabBar = NULL;
+
         ScalarAsInputTextId = 0;
         ColorEditOptions = ImGuiColorEditFlags__OptionsDefault;
         DragCurrentAccumDirty = false;