Suppress message if registry key not found

Author: andreasjordan

sp_Blitz.sql

@@ -8690,7 +8690,8 @@ IF @ProductVersionMajor >= 10 AND  NOT EXISTS ( SELECT  1
 								EXEC master.sys.xp_regread @rootkey = 'HKEY_LOCAL_MACHINE',
 														   @key = 'SOFTWARE\Policies\Microsoft\Power\PowerSettings',
 														   @value_name = 'ActivePowerScheme',
-														   @value = @outval OUTPUT;
+														   @value = @outval OUTPUT,
+														   @no_output = 'no_output';
 
 								IF @outval IS NULL /* If power plan was not set by group policy, get local value [Git Hub Issue #1620]*/
 								EXEC master.sys.xp_regread @rootkey = 'HKEY_LOCAL_MACHINE',