fix the fix for 64 bit

JJ's fix is too specific

Author: David Maloney

lib/metasm/metasm/cpu/x86_64/compile_c.rb

@@ -879,7 +879,7 @@ def c_ifgoto(expr, target)
 			r = c_cexpr_inner(expr.rexpr)
 			r = make_volatile(r, expr.type) if r.kind_of? ModRM and l.kind_of? ModRM
 			r = make_volatile(r, expr.type) if r.kind_of?(ModRM) and r.sz != l.sz
-			l = make_volatile(l, expr.type) if l.kind_of?(ModRM) and r.kind_of?(Reg) and r.sz != l.sz
+			l = make_volatile(l, expr.type) if l.kind_of?(ModRM)
 			if l.kind_of? Expression
 				o = { :< => :>, :> => :<, :>= => :<=, :<= => :>= }[o] || o
 				l, r = r, l