snprintf and vsnprintf are defined by Visual Studio 2008  (and not defined by earlier visual studio versions).
snprintf and vsnprintf are defined by Visual Studio 2008 
(and not defined by earlier visual studio versions).

This commit fixes an error compiling sipXportLib in visual studio 2008, 
while not disturbing compilability for other compilers. 



git-svn-id: f26ccc5efe72c2bd8e1c40f599fe313f2692e4de@11023 a612230a-c5fa-0310-af8b-88eea846685b

sipXtapi/sipXtapi-svn-mirror,sipXtapi/sipXtapi-svn-mirror,sipXtapi/sipXtapi-svn-mirror,sipXtapi/sipXtapi-svn-mirror,sipXtapi/sipXtapi-svn-mirror,sipXtapi/sipXtapi-svn-mirror,sipXtapi/sipXtapi-svn-mirror