bug in NSString:-dataUsingEncoding:allowLossyConversion:

[Stephen Brandon]

In NSString:-dataUsingEncoding:allowLossyConversion:, the variable "count" is 
used as a buffer byte counter for most formats (NSASCIIStringEncoding, 
NSISOLatin1StringEncoding etc), and the malloced buffer is converted to a 
NSData object using "count" as the data count.

For NSUTF8StringEncoding however, "count" is not used as the counter -- "j" 
is. But "count" is still used in line 2296 as the byte count sent to the 
NSData object. This is always zero.

NSString:2296 was:
      return [NSDataClass dataWithBytesNoCopy: buff
                                       length: count];

and should be:
      return [NSDataClass dataWithBytesNoCopy: buff
                                       length: j];


Cheers,
Stephen Brandon