Update requirement about SDL to SDL2

diff --git a/INSTALL.md b/INSTALL.md
index 707cf51..7dded45 100644 (file)
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -37,8 +37,7 @@ distributions.
   specific to your graphics card. Make sure that you have hardware
   accelerated OpenGL drivers installed. Software renderers like Mesa
   will make SuperTux unplayable slow.
   specific to your graphics card. Make sure that you have hardware
   accelerated OpenGL drivers installed. Software renderers like Mesa
   will make SuperTux unplayable slow.

-* SDL 1.2.5 or later (1.2.8 is recommended on Mac OS X)
-  <http://www.libsdl.org>
+* SDL2 2.0.0 or later <http://www.libsdl.org>

 * SDL_image (any version that includes PNG and JPEG support)
   <http://www.libsdl.org/projects/SDL_image>
 * PhysicsFS (1.0.x or 2.0.x) <http://www.icculus.org/physfs>
 * SDL_image (any version that includes PNG and JPEG support)
   <http://www.libsdl.org/projects/SDL_image>
 * PhysicsFS (1.0.x or 2.0.x) <http://www.icculus.org/physfs>