fix grammar-o, thanks to Duncan for noticing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50047 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/JumpThreading.cpp b/lib/Transforms/Scalar/JumpThreading.cpp
index 3bca7ff..b68a969 100644
--- a/lib/Transforms/Scalar/JumpThreading.cpp
+++ b/lib/Transforms/Scalar/JumpThreading.cpp
@@ -142,7 +142,7 @@
     return false; // Must be an invoke.
   
   // If the terminator of this block is branching on a constant, simplify the
-  // terminator to an unconditional branch.  This can occur do to threading in
+  // terminator to an unconditional branch.  This can occur due to threading in
   // other blocks.
   if (isa<ConstantInt>(Condition)) {
     DOUT << "  In block '" << BB->getNameStart()