Fix typos

llvm-svn: 210328
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index 8a987c3..4ebca79 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -103,7 +103,7 @@
   }
 
   /// \brief If 'aligned' declaration for given variable \a D was not seen yet,
-  /// add it and return NULL; otherwise return previous occurence's expression
+  /// add it and return NULL; otherwise return previous occurrence's expression
   /// for diagnostics.
   DeclRefExpr *addUniqueAligned(VarDecl *D, DeclRefExpr *NewDE);