Fix players being skipped in processStringTable (#52)

Due to an error when porting StatsHelix's demoinfocs, players were
skipped if there was a 'gap' between the string-table entries.

So if the string-table's userdata at index 3 was empty, for example,
players at index 4 and above would be ignored.

Author: markus-wa

stringtables.go

@@ -194,7 +194,7 @@ func (p *Parser) processStringTable(tab *msg.CSVCMsg_CreateStringTable) {
 		}
 
 		if len(userdata) == 0 {
-			break
+			continue
 		}
 
 		switch tab.Name {