Combine two lines that can be.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34818 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index da8e77a..9b000da 100644
--- a/lib/Support/APInt.cpp
+++ b/lib/Support/APInt.cpp
@@ -943,8 +943,7 @@
       VAL |= mask;
     else
       pVal[wordsBefore-1] |= mask;
-    clearUnusedBits();
-    return *this;
+    return clearUnusedBits();
   }
 
   uint64_t mask = wordBits == 0 ? 0 : ~0ULL << wordBits;