Drop surface events when reading from an XML file too

Remember those useless surface events that we ignore when we import a
dive from a dive computer? Yeah, they exist in the libdivelog xml files
too.  So ignore them when we see them there too.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parse-xml.c

@@ -1175,7 +1175,7 @@ static void event_start(void)
 
 static void event_end(void)
 {
-	if (event.name)
+	if (event.name && strcmp(event.name, "surface") != 0)
 		add_event(dive, event.time.seconds, event.type, event.flags, event.value, event.name);
 	event.active = 0;
 }