Typo in description of ptr (Ch. 7 p. 261)

[GoogleCodeExporter]

The description of "ptr" for clEnqueueReadBuffer currently reads "A pointer 
into host memory where the read data is to written to." It probably should be 
"data is to *be* written to" or just "data is written to."

Original issue reported on code.google.com by [email protected] on 25 Jan 2012 at 9:05