* dcrt0.cc (__argc_safe): New variable.

(dll_crt0_1): Store argc in __argc_safe, which will theoretically remain
untouched by the user.
* fhandler_console.cc (fhandler_console::read): Silence some compiler warnings.
* fhandler_raw.cc (fhandler_dev_raw::raw_read): Ditto.
* pinfo.cc (_pinfo::commune_recv): Carefully bound argv scan and check for
potentially bad pointers since user could have set argv cell to anythinw.
* cygheap.h (CYGHEAPSIZE): Bump up size.

winsup/cygwin/fhandler_raw.cc

@@ -333,7 +333,7 @@ fhandler_dev_raw::raw_read (void *ptr, size_t& ulen)
   return;
 
 err:
-  (ssize_t) ulen = -1;
+  ulen = (size_t) -1;
   return;
 }