Add error handling to Reader#read method - check return value from rxml_reader_read.
Add error handling to Reader#read method - check return value from rxml_reader_read.

xml4r/libxml-ruby,increments/libxml-ruby,sferik/libxml-ruby,sferik/libxml-ruby,increments/libxml-ruby,increments/libxml-ruby,sferik/libxml-ruby,xml4r/libxml-ruby,sferik/libxml-ruby,xml4r/libxml-ruby,sferik/libxml-ruby,sferik/libxml-ruby