don't ever use memory that has been freed (that was done by LU).

generic fixes for WIN32 libraries


git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1172 b08c6af1-5177-4d33-ba66-4b1c6b8b522a

H/dlmalloc.h

@@ -1,3 +1,6 @@
+
+#if USE_DL_MALLOC
+
 /* YAP only stuff */
 
 void STD_PROTO(Yap_initdlmalloc,(void));
@@ -1167,3 +1170,4 @@ nextchunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 
 */
 
+#endif /* USE_DL_MALLOC */