Log Message:
Update to 1.2.15:

General Notes

   * Fixed assembly register clobbering in CPU info routines
   * Fixed memory stomp when using stretch blit on large images
   * Fixed pixel corruption with overlapping blits
   * SDL_JOYSTICK_DEVICE can be a colon separated list of joystick devices
   * Disabled MMX blitters since they don't compile on modern compilers

Unix Notes

   * Fixed crash in joystick code on newer Linux kernels
   * Fixed channel swizzling for ALSA target with 6-channel output
   * Use the OpenGL GLX_EXT_swap_control extension if available
   * XRandR support is disabled by default because it causes desktop \ 
reconfiguring. It can be enabled with the SDL_VIDEO_X11_XRANDR=1
     environment variable, or by applying this patch: \ 
http://hg.libsdl.org/SDL/raw-rev/8ec3036098df

Windows Notes

   * Fixed SDL_GL_ACCELERATED_VISUAL handling
   * Fixed application state handling with ALT-Tab
   * Fixed occasional crash handling WM_ACTIVATEAPP in Direct X code
   * Fixed UTF-8 decoding of Russian characters

Mac OS X Notes

   * Fixed building and running on Mac OS X 10.7 (Lion)