Re-enable rwlocks for Borland.

Since we can't bool anyway, may as well.

src/xpdev/rwlockwrap.c

 #include "rwlockwrap.h"
 
-#if defined(__BORLANDC__)
-
-// Do nothing...
-
-#elif defined(_WIN32)
+#if defined(_WIN32)
 
 #include <stdlib.h>
 

src/xpdev/rwlockwrap.h

@@ -14,10 +14,6 @@ typedef pthread_rwlock_t rwlock_t;
 #define rwlock_unlock(lock) (pthread_rwlock_unlock(lock) == 0)
 #define rwlock_destroy(lock) (pthread_rwlock_destroy(lock) == 0)
 
-#elif defined(__BORLANDC__)
-
-// Not supported, but ignored...
-
 #elif defined(_WIN32)
 
 #include "gen_defs.h"	// For windows.h and BOOL!! :(