Bug 629653: Fix two cases where PL_ArenaRelease fails to "free" memory it should.  The patch was originally proposed by Brendan Eich in bug 41381 comment 5 in 2000, and was proposed recently by javakit@gmail.com. r=cjones,wtc.
Bug 629653: Fix two cases where PL_ArenaRelease fails to "free" memory it
should.  The patch was originally proposed by Brendan Eich in bug 41381
comment 5 in 2000, and was proposed recently by javakit@gmail.com.
r=cjones,wtc.

makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub