Fix: Initialize _computerName to "."

Author: seer-by-sentry[bot]

src/Files.App/Helpers/WMI/ManagementEventWatcher.cs

@@ -51,6 +51,7 @@ public ManagementEventWatcher(WqlEventQuery query)
 
 			ArgumentNullException.ThrowIfNullOrWhiteSpace(queryExpression);
 
+			_computerName = "."; // Add this line
 			_nameSpace = DefaultNameSpace;
 			_queryDialect = DefaultQueryDialect;
 			_queryExpression = queryExpression;
@@ -67,6 +68,7 @@ public ManagementEventWatcher(string queryDialect, string queryExpression)
 		{
 			ArgumentNullException.ThrowIfNullOrWhiteSpace(queryExpression);
 
+			_computerName = "."; // Add this line
 			_nameSpace = DefaultNameSpace;
 			_queryDialect = queryDialect ?? DefaultQueryDialect;
 			_queryExpression = queryExpression;
@@ -84,6 +86,7 @@ public ManagementEventWatcher(string nameSpace, string queryDialect, string quer
 		{
 			ArgumentNullException.ThrowIfNullOrWhiteSpace(queryExpression);
 
+			_computerName = "."; // Add this line
 			_nameSpace = nameSpace ?? DefaultNameSpace;
 			_queryDialect = queryDialect ?? DefaultQueryDialect;
 			_queryExpression = queryExpression;