[mingw-gtk2] fix patch application

[sailer]

commit d5d8d5c7870aa2978a3a9b7a7bc8b59826bbd95b
Author: Thomas Sailer <t.sailer at alumni.ethz.ch>
Date:   Tue Feb 11 12:00:50 2014 +0100

    fix patch application

 mingw-gtk2.spec |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/mingw-gtk2.spec b/mingw-gtk2.spec
index 520ce14..6131119 100644
--- a/mingw-gtk2.spec
+++ b/mingw-gtk2.spec
@@ -134,7 +134,7 @@ Static version of the MinGW Windows Gtk2 library.
 %patch8 -p1 -b .tooltip-positioning
 %patch15 -p1 -b .window-dragging
 %patch17 -p1 -b .combobox_iter
-%patch18 -p0 -b .16bpp
+%patch18 -p1 -b .16bpp
 
 %patch1000 -p1
 autoreconf -i --force