ShellPkg: BcfgDisplayDump(): hoist NULL-init of DevPath[String]

It will help with error handling if we move these initializations near the
top of the loop body.

This patch is not supposed to change behavior.

Cc: Jaben Carsey <jaben.carsey@intel.com>
Cc: Ryan Harkin <ryan.harkin@linaro.org>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19708 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Library/UefiShellBcfgCommandLib/UefiShellBcfgCommandLib.c

@@ -1060,6 +1060,9 @@ BcfgDisplayDump(
   for (LoopVar = 0 ; LoopVar < OrderCount ; LoopVar++) {
     Buffer        = NULL;
     BufferSize    = 0;
+    DevPath       = NULL;
+    DevPathString = NULL;
+
     UnicodeSPrint(VariableName, sizeof(VariableName), L"%s%04x", Op, CurrentOrder[LoopVar]);
 
     Status = gRT->GetVariable(
@@ -1085,15 +1088,10 @@ BcfgDisplayDump(
 
     if ((*(UINT16*)(Buffer+4)) != 0) {
       DevPath = AllocateZeroPool(*(UINT16*)(Buffer+4));
-      if (DevPath == NULL) {
-        DevPathString = NULL;
-      } else {
+      if (DevPath != NULL) {
         CopyMem(DevPath, Buffer+6+StrSize((CHAR16*)(Buffer+6)), *(UINT16*)(Buffer+4));
         DevPathString = ConvertDevicePathToText(DevPath, TRUE, FALSE);
       }
-    } else {
-      DevPath       = NULL;
-      DevPathString = NULL;
     }
     ShellPrintHiiEx(
       -1,