Initialize variables for container svn

Fix klocwork issues.

Signed-off-by: Subash Lakkimsetti <subash.lakkimsetti@intel.com>

BootloaderCommonPkg/Library/ContainerLib/ContainerLib.c

@@ -519,6 +519,8 @@ LocateComponentEntry (
   UINT32                    ContainerBase;
   UINT32                    ContainerSize;
 
+  CompEntry = NULL;
+
   // Search container header from cache
   ContainerEntry = GetContainerBySignature (ContainerSig);
   if (ContainerEntry == NULL) {

PayloadPkg/FirmwareUpdate/FirmwareUpdateHelper.c

@@ -482,6 +482,8 @@ CheckSblContainerSvn (
   EFI_STATUS                Status;
 
   Status = EFI_SUCCESS;
+  ContainerSvnCheck = 0;
+  ComponentSvnCheck = 0;
 
   // Locate container entry info from flash
   Status = LocateComponentEntry ((UINT32)ImageHdr->UpdateHardwareInstance, 0, &ContainerEntry, NULL);