Don't check for null after calling COFFObjectFile::toSec.

It can only return null if passed a corrupted reference with a null Ref.p.
Checking for null is then an issue for asserts to check for internal
consistency, not control flow to check for invalid input.

I didn't add an assert(sec != nullptr) because toSec itself has a far more
complete assert.

llvm-svn: 219235

llvm/lib/Object/COFFObjectFile.cpp

@@ -286,8 +286,6 @@ std::error_code COFFObjectFile::getSectionContents(DataRefImpl Ref,
 std::error_code COFFObjectFile::getSectionAlignment(DataRefImpl Ref,
                                                     uint64_t &Res) const {
   const coff_section *Sec = toSec(Ref);
-  if (!Sec)
-    return object_error::parse_failed;
   Res = uint64_t(1) << (((Sec->Characteristics & 0x00F00000) >> 20) - 1);
   return object_error::success;
 }