Fix bugs in the range analysis for integers....

src/hydrogen.cc

Index: src/hydrogen.cc
===================================================================
--- src/hydrogen.cc	(revision 6042)
+++ src/hydrogen.cc	(working copy)
@@ -1031,12 +1031,12 @@
   } else if (op == Token::LT || op == Token::LTE) {
     new_range = range->CopyClearLower();
     if (op == Token::LT) {
-      new_range->Add(-1);
+      new_range->AddConstant(-1);
     }
   } else if (op == Token::GT || op == Token::GTE) {
     new_range = range->CopyClearUpper();
     if (op == Token::GT) {
-      new_range->Add(1);
+      new_range->AddConstant(1);
     }
   }