lib/Object: Suppress warnings on gcc-4.3.4 cygwin

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141485 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Object/Archive.cpp b/lib/Object/Archive.cpp
index aeb629b..e2eaff5 100644
--- a/lib/Object/Archive.cpp
+++ b/lib/Object/Archive.cpp
@@ -146,7 +146,7 @@
   // Get the string table. It's the 3rd member.
   child_iterator StrTable = begin_children();
   child_iterator e = end_children();
-  for (int i = 0; StrTable != e && i < 2; ++StrTable, ++i);
+  for (int i = 0; StrTable != e && i < 2; ++StrTable, ++i) {}
 
   // Check to see if there were 3 members, or the 3rd member wasn't named "//".
   StringRef name;