gdiplus: Fix a memory leak in the tests.

[Nikolay Sivov]

On 12/15/2009 14:35, Huw Davies wrote:
> Found by Valgrind.
> ---
>   dlls/gdiplus/tests/customlinecap.c |    1 +
>   1 files changed, 1 insertions(+), 0 deletions(-)
Hi, Huw.

This leak will be fixed with corrected  GdipCreateCustomLineCap(). 
Return code should never
be Ok here.

P.S. Same with previous patch for  GdipCreateFontFamilyFromNam().