BaseTools: Fix the RaiseError variable issue caused by 855698fb69

The bug is that it cause the RaiseError always be set to TRUE even we
call the function with FALSE parameter.

Cc: Hess Chen <hesheng.chen@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Yonghong Zhu <yonghong.zhu@intel.com>
Reviewed-by: Hess Chen <hesheng.chen@intel.com>

BaseTools/Source/Python/Common/EdkLogger.py

@@ -198,8 +198,8 @@ def error(ToolName, ErrorCode, Message=None, File=None, Line=None, ExtraData=Non
         LogText = _ErrorMessageTemplateWithoutFile % TemplateDict
 
     _ErrorLogger.log(ERROR, LogText)
-    RaiseError = IsRaiseError
-    if RaiseError:
+
+    if RaiseError and IsRaiseError:
         raise FatalError(ErrorCode)
 
 # Log information which should be always put out