Add Steam's Quake 3 Arena dir to game dirs on Windows.

code/qcommon/q_shared.h

@@ -33,6 +33,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   #define CLIENT_WINDOW_MIN_TITLE 	"changeme2"
   #define HOMEPATH_NAME_UNIX		".foo"
   #define HOMEPATH_NAME_WIN		"FooBar"
+  #define STEAMPATH_NAME		"Foo Bar"
   #define HOMEPATH_NAME_MACOSX		HOMEPATH_NAME_WIN
   #define GAMENAME_FOR_MASTER		"foobar"	// must NOT contain whitespace
 //  #define LEGACY_PROTOCOL	// You probably don't need this for your standalone game
@@ -43,6 +44,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   #define CLIENT_WINDOW_MIN_TITLE 	"ioq3"
   #define HOMEPATH_NAME_UNIX		".q3a"
   #define HOMEPATH_NAME_WIN		"Quake3"
+  #define STEAMPATH_NAME		"Quake 3 Arena"
   #define HOMEPATH_NAME_MACOSX		HOMEPATH_NAME_WIN
   #define GAMENAME_FOR_MASTER		"Quake3Arena"
   #define LEGACY_PROTOCOL