vchoi_fork

[svn-r11258] Purpose:
Bug fix.

Description:
Reactivated the code for snprintf and vsnprintf for Tflops but added
the SN_SIZ_MIN as an attempt to require the minimum amount of space needed,
hoping vsnprintf/snprintf do not print larger than it per request.
Also added code to detect overflow and return error (IF overflow has
not crashed the application yet.)  These are all short term patches.

Platforms tested:
Tested at Tflops.