gdiplus: Check custom dash array for bad properties.

dlls/gdiplus/pen.c

@@ -223,9 +223,21 @@ GpStatus WINGDIPAPI GdipSetPenCustomStartCap(GpPen *pen, GpCustomLineCap* custom
 GpStatus WINGDIPAPI GdipSetPenDashArray(GpPen *pen, GDIPCONST REAL *dash,
     INT count)
 {
+    INT i;
+    REAL sum = 0;
+
     if(!pen || !dash)
         return InvalidParameter;
 
+    for(i = 0; i < count; i++){
+        sum += dash[i];
+        if(dash[i] < 0.0)
+            return InvalidParameter;
+    }
+
+    if(sum == 0.0 && count)
+        return InvalidParameter;
+
     GdipFree(pen->dashes);
     pen->dashes = NULL;
 

dlls/gdiplus/tests/pen.c

@@ -176,11 +176,9 @@ static void test_dasharray(void)
 
     /* Some invalid array values. */
     status = GdipSetPenDashArray(pen, &dashes[7], 5);
-    todo_wine
     expect(InvalidParameter, status);
     dashes[9] = -1.0;
     status = GdipSetPenDashArray(pen, &dashes[7], 5);
-    todo_wine
     expect(InvalidParameter, status);
 
     /* Try to set with count = 0. */