Fix spelling of `propagate'.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4423 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/LiveVar/BBLiveVar.cpp b/lib/Analysis/LiveVar/BBLiveVar.cpp
index 4b07ebc..30358a8 100644
--- a/lib/Analysis/LiveVar/BBLiveVar.cpp
+++ b/lib/Analysis/LiveVar/BBLiveVar.cpp
@@ -197,7 +197,7 @@
 
 
 //-----------------------------------------------------------------------------
-// propogates in set to OutSets of PREDECESSORs
+// propagates in set to OutSets of PREDECESSORs
 //-----------------------------------------------------------------------------
 
 bool BBLiveVar::applyFlowFunc() {