extra error checking.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@7559 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/loggers/mod_console/mod_console.c

@@ -138,7 +138,7 @@ static switch_status_t config_logger(void)
 #else
 				COLORIZE = 1;
 #endif
-			} else if (!strcasecmp(var, "loglevel")) {
+			} else if (!strcasecmp(var, "loglevel") && !switch_strlen_zero(val)) {
 				hard_log_level = switch_log_str2level(val);
 			}
 		}