InnoDB: correct two misleading comments

innobase/include/data0type.ic:
  Correct the comment of dtype_get_min_size()
sql/ha_innodb.h:
  Correct the comment of innobase_set_cursor_view()

innobase/include/data0type.ic

@@ -420,7 +420,7 @@ dtype_get_fixed_size(
 }
 
 /***************************************************************************
-Returns the size of a fixed size data type, 0 if not a fixed size type. */
+Returns the minimum size of a data type. */
 UNIV_INLINE
 ulint
 dtype_get_min_size(

sql/ha_innodb.h

@@ -344,4 +344,4 @@ restored to a transaction read view. */
 void
 innobase_set_cursor_view(
 /*=====================*/
-	void*	curview);	/* in: Consistent read view to be closed */
+	void*	curview);	/* in: Consistent read view to be set */