Only release the zend_strings when appropriate

Author: cmb69

ext/com_dotnet/com_com.c

@@ -208,12 +208,17 @@ PHP_METHOD(com, __construct)
 
 	if (server_name) {
 		if (info.pwszName) efree(info.pwszName);
+		if (server_params) zend_string_release(server_name);
+	}
+	if (user_name) {
+		zend_string_release(user_name);
+	}
+	if (password) {
+		zend_string_release(password);
+	}
+	if (domain_name) {
+		zend_string_release(domain_name);
 	}
-
-	zend_string_release(server_name);
-	zend_string_release(user_name);
-	zend_string_release(password);
-	zend_string_release(domain_name);
 
 	efree(moniker);