Solaris doesn't necessarily have stdint.h, use inttypes.h

Found this failure:
http://ppm4.activestate.com/sun4-solaris-64/5.14/1400/J/JA/JACQUESG/Git-Raw-0.41.d/log-20140803T142004.txt

This is easy enough to fix, use ```<sys/inttypes.h>``` instead of ```<stdint.h>```.

See:
http://wiki.opencsw.org/porting-faq#toc1