ShellPkg: Use compare operator for non-Boolean comparisons.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Qiu Shumin <shumin.qiu@intel.com>
Reviewed-by: Jaben Carsey <Jaben.carsey@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16120 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Library/UefiShellBcfgCommandLib/UefiShellBcfgCommandLib.c

@@ -1503,7 +1503,7 @@ BcfgLibraryRegisterBcfgCommand (
   IN CONST CHAR16      *Name
   )
 {
-  if (gShellBcfgHiiHandle) {
+  if (gShellBcfgHiiHandle != NULL) {
     return (EFI_SUCCESS);
   }