SemiSpace::AssertValidRange should use NewSpacePage::FromLimit for start.

Otherwise we get the wrong page when start == limit.

R=lrn@chromium.org

Review URL: http://codereview.chromium.org/7979019

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9362 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/spaces.cc

@@ -1313,7 +1313,7 @@ void SemiSpace::Verify() {
 
 void SemiSpace::AssertValidRange(Address start, Address end) {
   // Addresses belong to same semi-space
-  NewSpacePage* page = NewSpacePage::FromAddress(start);
+  NewSpacePage* page = NewSpacePage::FromLimit(start);
   NewSpacePage* end_page = NewSpacePage::FromLimit(end);
   SemiSpace* space = page->semi_space();
   CHECK_EQ(space, end_page->semi_space());