Fix USERSTORE_TOKENPERM calculation

Closes #2858

Author: erikdarling

sp_Blitz.sql

@@ -3632,8 +3632,8 @@ AS
 								BEGIN
 
 								SET @user_perm_sql += N'
-									SELECT @user_perm_gb = CASE WHEN (pages_kb / 128.0 / 1024.) >= 2.
-											THEN CONVERT(DECIMAL(38, 2), (pages_kb / 128.0 / 1024.))
+									SELECT @user_perm_gb = CASE WHEN (pages_kb / 1024. / 1024.) >= 2.
+											THEN CONVERT(DECIMAL(38, 2), (pages_kb / 1024. / 1024.))
 											ELSE NULL 
 										   END
 									FROM sys.dm_os_memory_clerks