Prepare push to trunk. Now working on version 3.17.3.

ChangeLog

Index: ChangeLog
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+2013-02-19: Version 3.17.2
+
+        Removed bogus check for TOP register in deoptimizer.
+        (Chromium issue 176943)
+
+        Changed and disabled global handle zapping.
+        (Chromium issue 176056)
+
+        Added zapping of disposed persistent handles.

[Jakob Kummerow, 2013/02/19 13:53:37]

Added then disabled handle zapping? Drop both entries.

+        (Chromium issue 176056)
+
+        Made the Isolate parameter mandatory for internal HandleScopes.
+        (issue 2487)
+
+        Fixed f.apply() optimization when declared arguments are mutated.
+        (issue 2539)
+
+        Performance and stability improvements on all platforms.
+
+
 2013-02-14: Version 3.17.1
 
         Performance and stability improvements on all platforms.