Hide error output from which command

Local version is used if a global system version isn't found. Without
this redirect, the error response from which is shown on the terminal,
even though everything is OK.

utils/lib_utils.sh

@@ -132,7 +132,7 @@ function make_hpr_sqlite_db {
 		return 1
 	fi
 
-	local MYSQL2SQLITE=`which mysql2sqlite`
+	local MYSQL2SQLITE=`which mysql2sqlite 2>/dev/null`
 	local BIN_PATH=""
 
 	if [ "$MYSQL2SQLITE" = "" ];