Add missing assert to Label destructor.

Review URL: http://codereview.chromium.org/7172026

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8316 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/assembler.h

@@ -90,7 +90,11 @@ class Label BASE_EMBEDDED {
     Unuse();
     UnuseNear();
   }
-  INLINE(~Label())                { ASSERT(!is_linked()); }
+
+  INLINE(~Label()) {
+    ASSERT(!is_linked());
+    ASSERT(!is_near_linked());
+  }
 
   INLINE(void Unuse()) { pos_ = 0; }
   INLINE(void UnuseNear()) { near_link_pos_ = 0; }