Minor tweak to CLOG_PRINT macro.  Initialalize tag buffer to NULL.  Use strncat as a fail safe.
Merge pull request #2032 from ntwerdochlib/master

Minor tweak to CLOG_PRINT macro.  Initialalize tag buffer to NULL.  Use ...
Merge branch 'master' of github.com:FreeRDP/FreeRDP

Conflicts:
	include/freerdp/channels/log.h