A few suggestions

[cosminginerica]

Hello Matthieu. While trying to use sxmlc on Linux, I found these 3 little things:

• In
  int XML_parse_attribute_to(const SXML_CHAR* str, int to, XMLAttribute* xmlattr)
  maybe change
  SXML_CHAR quote;
  to
  SXML_CHAR quote='\0'
  (variable used without initialisation)

• Maybe rename
  #define sx_strdup __strdup
  to
  #define sx_strdup __sx_strdup
  because it is already defined in /usr/include/bits/string2.h

• Variable ch could be used without being initialised in read_line_alloc(). Maybe set it to EOF here:
  if ((c = mgetc(in)) == EOF) { ch = EOF; break;

[matthieu-labas]

Thank you for your suggestions. I have implemented them to ease compilation warnings. I don't have string2.h on my system but I guess it's better practise, as strdup sounds like it could be re-used in some other libraries...
I have pushed v2.4.5 with the changes.