Fixed crash when resizing the window with the software renderer. This is similar to the crash fix in the OpenGL renderer in revision 4187
Fixed crash when resizing the window with the software renderer.
This is similar to the crash fix in the OpenGL renderer in revision 4187


git-svn-id: 75429ccc2030f235ccf16e6b9b7f8e83d5edd22e@4259 c70aab31-4412-0410-b14c-859654838e24

albertz/sdl,albertz/sdl,albertz/sdl,albertz/sdl