* bytecode.c (exec_byte_code): Don't use XVECTOR before CHECK_VECTOR.

src/ChangeLog

+2011-04-24  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* bytecode.c (exec_byte_code): Don't use XVECTOR before CHECK_VECTOR.
+
 2011-04-21  Paul Eggert  <eggert@cs.ucla.edu>
 
 	Make the Lisp reader and string-to-float more consistent.

src/bytecode.c

@@ -444,7 +444,7 @@ exec_byte_code (Lisp_Object bytestr, Lisp_Object vector, Lisp_Object maxdepth,
   /* Lisp_Object v1, v2; */
   Lisp_Object *vectorp;
 #ifdef BYTE_CODE_SAFE
-  int const_length = XVECTOR (vector)->size;
+  int const_length;
   Lisp_Object *stacke;
   int bytestr_length;
 #endif
@@ -466,6 +466,10 @@ exec_byte_code (Lisp_Object bytestr, Lisp_Object vector, Lisp_Object maxdepth,
   CHECK_VECTOR (vector);
   CHECK_NUMBER (maxdepth);
 
+#ifdef BYTE_CODE_SAFE
+  const_length = XVECTOR (vector)->size;
+#endif
+
   if (STRING_MULTIBYTE (bytestr))
     /* BYTESTR must have been produced by Emacs 20.2 or the earlier
        because they produced a raw 8-bit string for byte-code and now