BaseTools/VfrCompile: Avoid possible NULL pointer dereference

Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Dandan Bi <dandan.bi@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

BaseTools/Source/C/VfrCompile/VfrUtilityLib.cpp

@@ -665,7 +665,7 @@ CVfrVarDataTypeDB::GetTypeField (
 {
   SVfrDataField  *pField = NULL;
 
-  if ((FName == NULL) && (Type == NULL)) {
+  if ((FName == NULL) || (Type == NULL)) {
     return VFR_RETURN_FATAL_ERROR;
   }