BeginListBox(): fixed not consuming SetNextWindowXXX data when returning false.

imgui_widgets.cpp

@@ -1,4 +1,4 @@
-// dear imgui, v1.89.9
+// dear imgui, v1.90 WIP
 // (widgets code)
 
 /*
@@ -6630,6 +6630,7 @@ bool ImGui::BeginListBox(const char* label, const ImVec2& size_arg)
     {
         ItemSize(bb.GetSize(), style.FramePadding.y);
         ItemAdd(bb, 0, &frame_bb);
+        g.NextWindowData.ClearFlags(); // We behave like Begin() and need to consume those values
         return false;
     }