C#: Allow the use of pointer types in CSV validation.

Author: michaelnebel

csharp/ql/lib/semmle/code/csharp/dataflow/ExternalFlow.qll

@@ -262,7 +262,7 @@ module CsvValidation {
       not name.regexpMatch("[a-zA-Z0-9_<>,]*") and
       msg = "Dubious member name \"" + name + "\" in " + pred + " model."
       or
-      not signature.regexpMatch("|\\([a-zA-Z0-9_<>\\.\\+,\\[\\]]*\\)") and
+      not signature.regexpMatch("|\\([a-zA-Z0-9_<>\\.\\+\\*,\\[\\]]*\\)") and
       msg = "Dubious signature \"" + signature + "\" in " + pred + " model."
       or
       not ext.regexpMatch("|Attribute") and