-#define xalloc(_size) malloc(_size)
-#define xcalloc(_num,_size) calloc(_num,_size)
-#define xrealloc(_ptr,_size) realloc(_ptr,_size)
-#define xfree(_ptr) free(_ptr)
-#endif
+
+#define XTRANS_TRANSPORT_C /* used to flag Xtransint.h that it's being used
+ here, not just #included in another file */