a patch to get sdl2 compiling on windows for me

sdl2 windows

diff --git sdl2.cabal sdl2.cabal      
index 89def06..f4db1ae 100644         
--- sdl2.cabal                        
+++ sdl2.cabal                        
@@ -100,11 +100,10 @@ library         
     sdlhelper.h                      
                                      
   extra-libraries:                   
+    mingw32                          
+    SDL2main                         
     SDL2                             
                                      
-  pkgconfig-depends:                 
-    sdl2 >= 2.0.3                    
-                                     
   build-depends:                     
     base >= 4.7 && < 5,              
     bytestring >= 0.10.4.0 && < 0.11,