correct typos in comments / documentation
Merge pull request #99 from acmyo/typos

correct typos in comments / documentation
Update tinyxml2.h

format spaces
Update tinyxml2.h

*end != 0 => *_end != 0
Merge pull request #100 from selfpoised/master

minor change: from " *end != 0 => *_end != 0"
Fixed: LoadFile() returns XML_NO_ERROR for empty documents.
Merge pull request #104 from Vasily-Biryukov/master

LoadFile() returns XML_NO_ERROR for empty documents