client.c: Added information about error 12 and updated about error 3

Signed-off-by: Erik Alexandre Pucci <eap08@c3sl.ufpr.br>
Acked-by: Ricardo Tavares de Oliveira <rto07@c3sl.ufpr.br>
Signed-off-by: Danilo K. S. Yorinori <danilok@c3sl.ufpr.br>

src/client.c

@@ -28,7 +28,7 @@
  * Return: Exit status:
  *          1) Parameter error
  *          2) Soap error
- *          3) Version file error (open, read)
+ *          3) Version file error (open, memory allocation)
  *          4) Client out-of-date
  *          5) Server returned an error
  *          6) Unexpected server result
@@ -37,6 +37,7 @@
  *          9) Server did not find the version file
  *         10) Server returned an empty update link
  *         11) Invalid INEP error
+ *         12) XML file error (open, memory allocation)
  */
 int main(int argc, char **argv)
 {