ntdll: Build the virtual_release_address_space function on all platforms.

dlls/ntdll/virtual.c

@@ -1683,10 +1683,11 @@ static int free_reserved_memory( void *base, size_t size, void *arg )
  */
 void virtual_release_address_space( BOOL free_high_mem )
 {
-#ifdef __i386__
     struct free_range range;
     sigset_t sigset;
 
+    if (user_space_limit == address_space_limit) return;  /* no need to free anything */
+
     server_enter_uninterrupted_section( &csVirtual, &sigset );
 
     /* no large address space on win9x */
@@ -1707,7 +1708,6 @@ void virtual_release_address_space( BOOL free_high_mem )
     }
 
     server_leave_uninterrupted_section( &csVirtual, &sigset );
-#endif
 }