Fix a comment typo noticed by Sandro Magi.

llvm-svn: 41018
diff --git a/llvm/lib/ExecutionEngine/ExecutionEngine.cpp b/llvm/lib/ExecutionEngine/ExecutionEngine.cpp
index bbddb95..325ab8a 100644
--- a/llvm/lib/ExecutionEngine/ExecutionEngine.cpp
+++ b/llvm/lib/ExecutionEngine/ExecutionEngine.cpp
@@ -336,7 +336,7 @@
 
 /// This function converts a Constant* into a GenericValue. The interesting 
 /// part is if C is a ConstantExpr.
-/// @brief Get a GenericValue for a Constnat*
+/// @brief Get a GenericValue for a Constant*
 GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
   // If its undefined, return the garbage.
   if (isa<UndefValue>(C))