* cd_sdl.c (get_cddev_arg): check for null or empty arguments also

for non-windows platforms.


git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@286 af15c1b1-3010-417e-b628-4374ebc0bcbd

Quake/cd_sdl.c

@@ -480,6 +480,8 @@ static const char *get_cddev_arg (const char *arg)
 	}
 	return NULL;
 #else
+	if (!arg || ! *arg)
+		return NULL;
 	return arg;
 #endif
 }