Use HAVE_SETENV. This must've been a leftover from before configure was used.

git-svn-id: svn://katsu.triplehelix.org/dgamelaunch/trunk@461 db0b04b0-f4d1-0310-9a6d-de3e77497b0e

dgamelaunch.h

@@ -213,7 +213,7 @@ extern void graceful_exit(int status);
 extern int purge_stale_locks(int game);
 /*extern int menuloop(void);*/
 extern void ttyrec_getpty(void);
-#if !defined(BSD) && !defined(__linux__)
+#ifndef HAVE_SETENV
 extern int mysetenv (const char* name, const char* value, int overwrite);
 #else
 # define mysetenv setenv