[PHP-DOC] Manual Correction

[Ron Hoeflinger]

The description area of function:            imagecreatetruecolor ( int x_size, int y_size ) should read:          returns an image identifier representing a blank image of size x_size by y_size A small point perhaps, but confusing because the function is specifically for color images and the incorrect text implies B&W. Ron Hoeflinger eMUNICATIONS.com