[PATCH 1/1] winex11.drv: Fix an inverted condition in x11drv_surface_swap().

[Elizabeth Figura]

From: Elizabeth Figura

Spotted by Henri Verbeet.

Fixes: df00a5c097cd9cb292952f5307ee96d96fbc58b4
---
 dlls/winex11.drv/opengl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/winex11.drv/opengl.c b/dlls/winex11.drv/opengl.c
index c4cc2b1fe1f..019590964ba 100644
--- a/dlls/winex11.drv/opengl.c
+++ b/dlls/winex11.drv/opengl.c
@@ -1453,7 +1453,7 @@ static BOOL x11drv_surface_swap( struct opengl_drawable *base )

TRACE( "drawable %s\n", debugstr_opengl_drawable( base ) );

-    if ((offscreen = InterlockedCompareExchange( &base->client->offscreen, 0, 0 )) ||
+    if (!(offscreen = InterlockedCompareExchange( &base->client->offscreen, 0, 0 )) ||
         !ctx || !pglXSwapBuffersMscOML) pglXSwapBuffers( gdi_display, gl->drawable );
     else
     {