Fix GCC build failure.

Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14519 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Library/UefiShellDebug1CommandsLib/Bcfg.c

@@ -525,6 +525,7 @@ BcfgAddDebug1(
 
       CopyMem (TempByteBuffer, Desc, DescSize);
       TempByteBuffer += DescSize;
+      ASSERT (FilePath != NULL);
       CopyMem (TempByteBuffer, FilePath, FilePathSize);
 
       UnicodeSPrint (OptionStr, sizeof(OptionStr), L"%s%04x", Target == BcfgTargetBootOrder?L"Boot":L"Driver", TargetLocation);