C#: Fix test for AspLine.

Author: calumgrant

csharp/ql/test/query-tests/Security Features/CWE-079/StoredXSS/AspInline.ql

@@ -1,10 +1,10 @@
 import csharp
 import semmle.code.csharp.security.dataflow.XSS
 
-string tweakMemberLocation(XSS::AspInlineMember inline, Member member) {
+string tweakMemberLocation(Member member) {
   exists(Location loc |
     loc = member.getLocation() and
-    if loc.getFile().getParentContainer() = inline.getLocation().getFile().getParentContainer()
+    if loc instanceof SourceLocation
     then result = loc.toString()
     else result = "<outside test directory>"
   )
@@ -14,4 +14,4 @@ from XSS::AspInlineMember inline, Member member
 where member = inline.getMember()
 // some members, such as ASP members inherited from DLLs, are outside the test directory,
 // so we select them specially using a modified location and the normal toString
-select inline, tweakMemberLocation(inline, member), member.toString()
+select inline, tweakMemberLocation(member), member.toString()