Fix a typo (the the => the)

llvm-svn: 160622
diff --git a/clang/include/clang-c/Index.h b/clang/include/clang-c/Index.h
index 93a5224..0c45697 100644
--- a/clang/include/clang-c/Index.h
+++ b/clang/include/clang-c/Index.h
@@ -2788,7 +2788,7 @@
 CINDEX_LINKAGE CXType clang_getArrayElementType(CXType T);
 
 /**
- * \brief Return the the array size of a constant array.
+ * \brief Return the array size of a constant array.
  *
  * If a non-array type is passed in, -1 is returned.
  */