return string length

[terminalXXX]

Today we have run into a little problem, too tiny for me to have paid my attention to

int processString(xxx)
{
   //do something
   return non-null terminated string length
} 

to make the function work better we change its internals

int processString(xxx)
{
   //do something
   return null terminated string length
} 

This phenonmenon can be observed by use of mutibyte to wide char conversions, string copy , concatenation functions of MS etc

Should I minus one in the return value of the second function to match both versions ? Thank you.