can't use MSG_NOSIGNAL in a BEGIN block, it turns out, so my optimization

for Linux and other Unices with MSG_NOSIGNAL wasn't working before.
this works, while still working on FreeBSD/Solaris/etc


git-svn-id: http://code.sixapart.com/svn/memcached/trunk/api/perl@170 b0b603af-a30f-0410-a34e-baf09ae79d0b

Author: bradfitz

Memcached.pm

@@ -27,12 +27,13 @@ use constant COMPRESS_SAVINGS => 0.20; # percent
 use vars qw($VERSION $HAVE_ZLIB $FLAG_NOSIGNAL);
 $VERSION = "1.0.12-pre";
 
-$FLAG_NOSIGNAL = 0;
 BEGIN {
     $HAVE_ZLIB = eval "use Compress::Zlib (); 1;";
-    $FLAG_NOSIGNAL = eval { MSG_NOSIGNAL } || 0;
 }
 
+$FLAG_NOSIGNAL = 0;
+eval { $FLAG_NOSIGNAL = MSG_NOSIGNAL; };
+
 my %host_dead;   # host -> unixtime marked dead until
 my %cache_sock;  # host -> socket