#24 StyleSheet parsing error

[Murat]

StyleSheet.parseDeclarationKeyValue function has a bug. if style ends with ";", then this function tries to parse a string of "". so throws an exception and, this exception couses this whole style ignored.

for solution, I added these lines to start of parseDeclarationKeyValue

if (keyValue == null || keyValue.trim().equals("")){
return;
} else if (keyValue.indexOf(":") == -1){
return;
}