gdiplus: Add a stub for GdipSetCustomLineCapBaseCap.

dlls/gdiplus/customlinecap.c

@@ -129,3 +129,14 @@ GpStatus WINGDIPAPI GdipSetCustomLineCapStrokeCaps(GpCustomLineCap* custom,
 
     return NotImplemented;
 }
+
+GpStatus WINGDIPAPI GdipSetCustomLineCapBaseCap(GpCustomLineCap* custom,
+    GpLineCap base)
+{
+    static int calls;
+
+    if(!(calls++))
+        FIXME("not implemented\n");
+
+    return NotImplemented;
+}

dlls/gdiplus/gdiplus.spec

@@ -514,7 +514,7 @@
 @ stdcall GdipSetClipRegion(ptr ptr long)
 @ stdcall GdipSetCompositingMode(ptr long)
 @ stdcall GdipSetCompositingQuality(ptr long)
-@ stub GdipSetCustomLineCapBaseCap
+@ stdcall GdipSetCustomLineCapBaseCap(ptr long)
 @ stub GdipSetCustomLineCapBaseInset
 @ stdcall GdipSetCustomLineCapStrokeCaps(ptr long long)
 @ stub GdipSetCustomLineCapStrokeJoin