make ImPlotPoint::Clamp const

Author: epezent

implot.h

@@ -582,8 +582,8 @@ struct ImPlotRect {
     IMPLOT_API bool Contains(const ImPlotPoint& p) const                                    { return Contains(p.x, p.y);                 }
     IMPLOT_API bool Contains(double x, double y) const                                      { return X.Contains(x) && Y.Contains(y);     }
     IMPLOT_API ImPlotPoint Size() const                                                     { return ImPlotPoint(X.Size(), Y.Size());    }
-    IMPLOT_API ImPlotPoint Clamp(const ImPlotPoint& p)                                      { return Clamp(p.x, p.y);                    }
-    IMPLOT_API ImPlotPoint Clamp(double x, double y)                                        { return ImPlotPoint(X.Clamp(x),Y.Clamp(y)); }
+    IMPLOT_API ImPlotPoint Clamp(const ImPlotPoint& p) const                                { return Clamp(p.x, p.y);                    }
+    IMPLOT_API ImPlotPoint Clamp(double x, double y) const                                  { return ImPlotPoint(X.Clamp(x),Y.Clamp(y)); }
     IMPLOT_API ImPlotPoint Min() const                                                      { return ImPlotPoint(X.Min, Y.Min);          }
     IMPLOT_API ImPlotPoint Max() const                                                      { return ImPlotPoint(X.Max, Y.Max);          }
 };