* miscfuncs.cc (check_invalid_virtual_addr): Assure the last page

in the range is always tested.  Add appropriate const.
	* mmap.cc (mmap_record::aloc_fh): Remove unused static path_conf object.

winsup/cygwin/miscfuncs.cc

@@ -218,9 +218,10 @@ int __stdcall
 check_invalid_virtual_addr (const void *s, unsigned sz)
 {
   MEMORY_BASIC_INFORMATION mbuf;
-  void *end;
+  const void *end;
 
-  for (end = (char *) s + sz; s < end; s = (char *) s + mbuf.RegionSize)
+  for (end = (char *) s + sz; s < end;
+       s = (char *) mbuf.BaseAddress + mbuf.RegionSize)
     if (!VirtualQuery (s, &mbuf, sizeof mbuf))
       return EINVAL;
   return 0;