[PATCH] gdi32: fix PatBlt() drawing with negative width/height

[Damjan Jovanovic]

In a (x, y, w, h) rectangle passed to PatBlt(), a negative w results in
the rectangle drawn being (x+w, y, -w, h), and negative h results in
(x, y+h, w, -h). Wine instead does (x+w+1, y, -w, h) and
(x, y+h+1, w, -h), so the rectangle drawn is shifted
1 pixel row too far down and/or 1 pixel column too far right.
This patch recalculates the rectangle dimensions correctly.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=27584
Signed-off-by: Damjan Jovanovic 
---
 dlls/gdi32/bitblt.c       | 11 +++++++++++
 dlls/gdi32/tests/bitmap.c | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)