found a an issue during check with cppcheck

hi,

during a check of the current svn head with the static code analysis tool cppcheck, the tool found an issue
in plcore.c at line 965

Take a look at the code:
...
char buf[BUFFER_SIZE];
/*1*/ strncpy( buf, "UTF-8 string is malformed: ", BUFFER_SIZE );
/*2*/ strncat( buf, string, 30 );
...

strncpy does not append a '\0' (=Nulltermination) at the end of the string, and strncat needs a nullterminated
string to attach correctly!

http://www.cplusplus.com/reference/clibrary/cstring/strncpy/
http://www.cplusplus.com/reference/clibrary/cstring/strncat/

Best regards

Ettl Martin