build error on linux, nmethod.cpp

[Deneau, Tom]

When I pulled from http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot
and then tried to compile on linux, I got the following new error...

  cc1plus: warnings being treated as errors
  /hotspot-comp-latest/src/share/vm/code/nmethod.cpp: In member function 'bool nmethod::make_not_entrant_or_zombie(int)':
  /hotspot-comp-latest/src/share/vm/code/nmethod.cpp:1197: warning: comparison between signed and unsigned integer expressions

I am using
   gcc version 4.1.2 20070502 (Red Hat 4.1.2-12)

# hg tip
changeset:   1102:1ea456c6f2b7
tag:         tip
parent:      1101:cf9a9a50e763
parent:      1098:032260830071
user:        iveresov
date:        Tue Dec 22 17:56:03 2009 -0800
summary:     Merge

-- Tom Deneau