Merge pull request github#13757 from geoffw0/sources

Swift: Pragmatic fix for CustomUrlSchemes.qll.

Author: geoffw0

swift/ql/lib/codeql/swift/frameworks/StandardLibrary/CustomUrlSchemes.qll

@@ -56,7 +56,9 @@ private class ApplicationWithLaunchOptionsFunc extends Function {
 
 private class LaunchOptionsUrlVarDecl extends VarDecl {
   LaunchOptionsUrlVarDecl() {
-    this.getEnclosingDecl().asNominalTypeDecl().getFullName() = "UIApplication.LaunchOptionsKey" and
+    // ideally this would be the more accurate, but currently less robust:
+    // this.getEnclosingDecl().asNominalTypeDecl().getFullName() = "UIApplication.LaunchOptionsKey" and
+    this.getType().(NominalType).getFullName() = "UIApplication.LaunchOptionsKey" and
     this.getName() = "url"
   }
 }