Calling Google("putrsUSART") returned this (PDF) document.
According to it, putrsUSART() will send the null terminator of a C-string. If you don't want that, you will have to send each character yourself using putcUSART().
You'll have better luck with your PIC specific questions here: http://forum.microchip.com/
Use these forums (Cprogramming.com) if you need authoritative answers for any of your C or C++ questions
gg
