imnodes: fixed compatibility with dear imgui 1.89.5

3rdparty/imnodes/imnodes.cpp

@@ -6,10 +6,10 @@
 // [SECTION] render helpers
 // [SECTION] API implementation
 
+#define IMGUI_DEFINE_MATH_OPERATORS
 #include "imnodes.h"
 #include "imnodes_internal.h"
 
-#define IMGUI_DEFINE_MATH_OPERATORS
 #include <imgui_internal.h>
 
 // Check minimum ImGui version
@@ -2345,7 +2345,6 @@ void EndNodeEditor()
     ImGui::EndChild();      // end scrolling region
     ImGui::PopStyleColor(); // pop child window background color
     ImGui::PopStyleVar();   // pop window padding
-    ImGui::PopStyleVar();   // pop frame padding
     ImGui::EndGroup();
 }