fix: Unahdled exception in adding a custom logger

Fix #6

src/common/abstract.logger.ts

@@ -67,10 +67,10 @@ export abstract class AbstractLogger {
             if (tmpLogger.LoggerIdentity === this.LoggerIdentity)
                 return true;
             tmpLogger = tmpLogger.NextLogger;
-        } while (tmpLogger !== null || tmpLogger !== undefined)
+        } while (tmpLogger !== null && tmpLogger !== undefined)
         return false;
     }
 
     abstract processEvent(source: string, eventName: string, properties: any);
     abstract processException(source, error: Error, properties: any);
-}
+}