* macroexp.c (macro_stringify): Terminate the string.

gdb/ChangeLog

@@ -1,3 +1,7 @@
+2012-05-21  Tom Tromey  <tromey@redhat.com>
+
+	* macroexp.c (macro_stringify): Terminate the string.
+
 2012-05-20  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
 	* NEWS (--with-auto-load-dir): Prepend $debugdir to the default path.

gdb/macroexp.c

@@ -704,6 +704,7 @@ macro_stringify (const char *str)
 
   init_buffer (&buffer, len);
   stringify (&buffer, str, len);
+  appendc (&buffer, '\0');
 
   return free_buffer_return_text (&buffer);
 }