treewide: Make explicit that 'dev' output of SDL is used

pkgs/development/interpreters/love/0.7.nix

@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
   '';
 
   NIX_CFLAGS_COMPILE = ''
-    -I${SDL}/include/SDL
+    -I${SDL.dev}/include/SDL
     -I${freetype.dev}include/freetype2
   '';
 

pkgs/games/0ad/default.nix

@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
     "-I${xproto}/include/X11"
     "-I${libX11.dev}/include/X11"
     "-I${libXcursor.dev}/include/X11"
-    "-I${SDL}/include/SDL"
+    "-I${SDL.dev}/include/SDL"
     "-I${SDL2}/include/SDL2"
   ];
 

pkgs/games/brogue/default.nix

@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   prePatch = ''
     sed -i Makefile -e 's,LIBTCODDIR=.*,LIBTCODDIR=${libtcod},g' \
-                    -e 's,sdl-config,${SDL}/bin/sdl-config,g'
+                    -e 's,sdl-config,${SDL.dev}/bin/sdl-config,g'
     sed -i src/platform/tcod-platform.c -e "s,fonts/font,$out/share/brogue/fonts/font,g"
     make clean
     rm -rf src/libtcod*