Clean up GenericBdsLib library Instance.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5449 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Library/GenericBdsLib/BdsConsole.c

@@ -14,6 +14,15 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
 #include "InternalBdsLib.h"
 
+/**
+  Check if we need to save the EFI variable with "ConVarName" as name
+  as NV type
+
+  @param ConVarName The name of the EFI variable.
+
+  @retval TRUE    Set the EFI variabel as NV type.
+  @retval FALSE   EFI variabel as NV type can be set NonNV.
+**/
 BOOLEAN
 IsNvNeed (
   IN CHAR16 *ConVarName
@@ -27,7 +36,7 @@ IsNvNeed (
   // If the variable includes "Dev" at last, we consider
   // it does not support NV attribute.
   //
-  while (*Ptr) {
+  while (*Ptr != L'\0') {
     Ptr++;
   }