Merge topic 'FindSDL-path-suffixes'

c5c217c6 FindSDL: Add path suffixes for <prefix>/include/(SDL|SDL12|SDL11)

Modules/FindSDL.cmake

@@ -70,7 +70,9 @@
 find_path(SDL_INCLUDE_DIR SDL.h
   HINTS
     ENV SDLDIR
-  PATH_SUFFIXES include/SDL include/SDL12 include/SDL11 include
+  PATH_SUFFIXES SDL SDL12 SDL11
+                # path suffixes to search inside ENV{SDLDIR}
+                include/SDL include/SDL12 include/SDL11 include
 )
 
 # SDL-1.1 is the name used by FreeBSD ports...