Internals: ImRect: Added IsFinite() helper.

imgui_internal.h

@@ -281,6 +281,7 @@ struct IMGUI_API ImRect
     void        Translate(const ImVec2& v)      { Min.x += v.x; Min.y += v.y; Max.x += v.x; Max.y += v.y; }
     void        ClipWith(const ImRect& clip)    { if (Min.x < clip.Min.x) Min.x = clip.Min.x; if (Min.y < clip.Min.y) Min.y = clip.Min.y; if (Max.x > clip.Max.x) Max.x = clip.Max.x; if (Max.y > clip.Max.y) Max.y = clip.Max.y; }
     void        Floor()                         { Min.x = (float)(int)Min.x; Min.y = (float)(int)Min.y; Max.x = (float)(int)Max.x; Max.y = (float)(int)Max.y; }
+    bool        IsFinite() const                { return Min.x != FLT_MAX; }
     ImVec2      GetClosestPoint(ImVec2 p, bool on_edge) const
     {
         if (!on_edge && Contains(p))