[Serusers] recent nathelper changes break integration with rel_0_8_12

Just an FYI I suppose, as I don't see any other notice about this. It seems recent changes to nathelper on the trunk have made it incompatible with the 0.8.12 branch. This prevents using the latest RTP Proxy with SER stable.

nathelper.c: In function `force_rtp_proxy1_f': nathelper.c:1432: `IP_ADDR_MAX_STR_SIZE' undeclared (first use in this function) nathelper.c:1432: (Each undeclared identifier is reported only once nathelper.c:1432: for each function it appears in.) nathelper.c:1432: warning: unused variable `newip' make[1]: *** [nathelper.o] Error 1

I plan to check out a week or two-old version of nathelper from trunk. If the changes made since then were critical bug or security fixes, it would be helpful to know.