comdlg32: Clamp hue and saturation when clicking in colour graph in colour dialog.

dlls/comdlg32/colordlg.c

@@ -337,8 +337,10 @@ static int CC_MouseCheckColorGraph( HWND hDlg, int dlgitem, int *hori, int *vert
  ClientToScreen(hDlg, &point);
  hwnd = GetDlgItem( hDlg, dlgitem );
  GetWindowRect(hwnd, &rect);
- if (PtInRect(&rect, point))
- {
+
+ if (!PtInRect(&rect, point))
+  return 0;
+
  GetClientRect(hwnd, &rect);
  ScreenToClient(hwnd, &point);
 
@@ -347,14 +349,17 @@ static int CC_MouseCheckColorGraph( HWND hDlg, int dlgitem, int *hori, int *vert
  y = (long) (rect.bottom - point.y) * MAXVERT;
  y /= rect.bottom;
 
+ if (x < 0) x = 0;
+ if (y < 0) y = 0;
+ if (x > MAXHORI) x = MAXHORI;
+ if (y > MAXVERT) y = MAXVERT;
+
  if (hori)
   *hori = x;
  if (vert)
   *vert = y;
+
  return 1;
- }
- else
-  return 0;
 }
 /***********************************************************************
  *                  CC_MouseCheckResultWindow                 [internal]