inverted logic, caught by coverity


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28290 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/VMCore/AsmWriter.cpp b/lib/VMCore/AsmWriter.cpp
index f21bd84..abbb8a8 100644
--- a/lib/VMCore/AsmWriter.cpp
+++ b/lib/VMCore/AsmWriter.cpp
@@ -582,7 +582,7 @@
         Slot = Machine->getSlot(V);
       } else {
         Machine = createSlotMachine(V);
-        if (Machine == 0)
+        if (Machine)
           Slot = Machine->getSlot(V);
         else
           Slot = -1;