* emacs.c (gdb_pvec_type): Change it back to enum pvec_type.

This variable's comment says Emacs needs at least one GDB-visible
symbol of type enum pvec_type, to work around GDB problems.
The symbol's value doesn't matter.

src/ChangeLog

 2012-07-04  Paul Eggert  <eggert@cs.ucla.edu>
 
+	* emacs.c (gdb_pvec_type): Change it back to enum pvec_type.
+	This variable's comment says Emacs needs at least one GDB-visible
+	symbol of type enum pvec_type, to work around GDB problems.
+	The symbol's value doesn't matter.
+
 	* alloc.c (PSEUDOVECTOR_NBYTES): Remove stray ';'
 	that causes compilation to fail on pre-C99 compilers.
 

src/emacs.c

@@ -119,7 +119,7 @@ ptrdiff_t PVEC_FLAG EXTERNALLY_VISIBLE = PSEUDOVECTOR_FLAG;
 ptrdiff_t gdb_array_mark_flag EXTERNALLY_VISIBLE = ARRAY_MARK_FLAG;
 /* GDB might say "No enum type named pvec_type" if we don't have at
    least one symbol with that type, and then xbacktrace could fail.  */
-ptrdiff_t gdb_pvec_type EXTERNALLY_VISIBLE = PVEC_TYPE_MASK;
+enum pvec_type const gdb_pvec_type EXTERNALLY_VISIBLE = 0;
 
 /* Empty lisp strings.  To avoid having to build any others.  */
 Lisp_Object empty_unibyte_string, empty_multibyte_string;