tiny fix for irix: use putenv instead of setenv

source/creator/creator.c

@@ -544,9 +544,13 @@ int main(int argc, char **argv)
 #else
 		_putenv_s("SDL_VIDEODRIVER", "dummy");
 #endif
+#else
+#ifdef __sgi
+		putenv("SDL_VIDEODRIVER=dummy");
 #else
 		setenv("SDL_VIDEODRIVER", "dummy", 1); /* initializing the video driver can cause crashes on some systems - Campbell */
 #endif
+#endif
 #ifdef __linux__
 		/* On linux the default SDL driver dma often would not play
 		 * use alsa if none is set */