[PATCH v2 3/3] gdiplus: Avoid calling GdipFillPath() with an empty path.

[Vincent Povirk]

This breaks a test:

graphics.c:1764: Test failed: Expected 4, got 0
0060:fixme:gdiplus:GdipGetNearestColor (0x88120, 0x23f96c): Passing
color unmodified
0060:fixme:gdiplus:GdipMeasureDriverString Ignoring flags 100
Makefile:327: recipe for target 'graphics.ok' failed
make: *** [graphics.ok] Error 1