Comments about limiting WindowRounding to a reasonable size.

imgui_internal.h

@@ -1561,7 +1561,7 @@ struct IMGUI_API ImGuiWindow
     ImVec2                  ContentSize;                        // Size of contents/scrollable client area (calculated from the extents reach of the cursor) from previous frame. Does not include window decoration or window padding.
     ImVec2                  ContentSizeExplicit;                // Size of contents/scrollable client area explicitly request by the user via SetNextWindowContentSize().
     ImVec2                  WindowPadding;                      // Window padding at the time of Begin().
-    float                   WindowRounding;                     // Window rounding at the time of Begin().
+    float                   WindowRounding;                     // Window rounding at the time of Begin(). May be clamped lower to avoid rendering artifacts with title bar, menu bar etc.
     float                   WindowBorderSize;                   // Window border size at the time of Begin().
     int                     NameBufLen;                         // Size of buffer storing Name. May be larger than strlen(Name)!
     ImGuiID                 MoveId;                             // == window->GetID("#MOVE")