gdiplus: Add a stub for GdipSetCustomLineCapWidthScale.

dlls/gdiplus/customlinecap.c

@@ -173,3 +173,14 @@ GpStatus WINGDIPAPI GdipSetCustomLineCapStrokeJoin(GpCustomLineCap* custom,
 
     return NotImplemented;
 }
+
+GpStatus WINGDIPAPI GdipSetCustomLineCapWidthScale(GpCustomLineCap* custom,
+    REAL width)
+{
+    static int calls;
+
+    if(!(calls++))
+        FIXME("not implemented\n");
+
+    return NotImplemented;
+}

dlls/gdiplus/gdiplus.spec

@@ -518,7 +518,7 @@
 @ stdcall GdipSetCustomLineCapBaseInset(ptr long)
 @ stdcall GdipSetCustomLineCapStrokeCaps(ptr long long)
 @ stdcall GdipSetCustomLineCapStrokeJoin(ptr long)
-@ stub GdipSetCustomLineCapWidthScale
+@ stdcall GdipSetCustomLineCapWidthScale(ptr long)
 @ stub GdipSetEffectParameters
 @ stub GdipSetEmpty
 @ stub GdipSetImageAttributesCachedBackground