Fix from pthomas@suse.de (Philipp Thomas) for 64-bit conflict between ptrdiff_t and JS_BIT/JSUint32 (r=shaver, a=dbaron).

js/src/jsemit.h

@@ -157,7 +157,7 @@ struct JSJumpTarget {
 
 #define BITS_PER_PTRDIFF        (sizeof(ptrdiff_t) * JS_BITS_PER_BYTE)
 #define BITS_PER_BPDELTA        (BITS_PER_PTRDIFF - 1 - JT_UNTAG_SHIFT)
-#define BPDELTA_MAX             ((ptrdiff_t)(JS_BIT(BITS_PER_BPDELTA) - 1))
+#define BPDELTA_MAX             (((ptrdiff_t)1 << BITS_PER_BPDELTA) - 1)
 #define BPDELTA_TO_JT(bp)       ((JSJumpTarget *)((bp) << JT_UNTAG_SHIFT))
 #define JT_TO_BPDELTA(jt)       ((ptrdiff_t)((jsword)(jt) >> JT_UNTAG_SHIFT))