Fix a typo in my previous commit

Author: cachemeifyoucan

llvm/lib/ObjectYAML/MachOEmitter.cpp

@@ -494,7 +494,7 @@ void UniversalWriter::writeMachO(raw_ostream &OS) {
   writeFatArchs(OS);
 
   auto &FatFile = *ObjectFile.FatMachO;
-  assert(FatFile.FatArchs.size() > FatFile.Slices.size() &&
+  assert(FatFile.FatArchs.size() >= FatFile.Slices.size() &&
          "Cannot write Slices if not decribed in FatArches");
   for (size_t i = 0; i < FatFile.Slices.size(); i++) {
     ZeroToOffset(OS, FatFile.FatArchs[i].offset);