Fix some constructs that gcc-4.4 warns about.

llvm-svn: 51591
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index ff505f2..44c72b6 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -2986,7 +2986,7 @@
   }
 
   bool Indexed = AM != ISD::UNINDEXED;
-  assert(Indexed || Offset.getOpcode() == ISD::UNDEF &&
+  assert((Indexed || Offset.getOpcode() == ISD::UNDEF) &&
          "Unindexed load with an offset!");
 
   SDVTList VTs = Indexed ?