d: Add testcase from PR108962

The issue was fixed in r13-7518.

	PR d/108962

gcc/testsuite/ChangeLog:

	* gdc.dg/pr108962.d: New test.

(cherry picked from commit 2e06e39a12e5a79bdb72d3c146cc71292f875aed)

gcc/testsuite/gdc.dg/pr108962.d

@@ -0,0 +1,13 @@
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108962
+// { dg-do compile }
+// { dg-options "-fno-exceptions -fdump-tree-original" }
+extern(C) void main()
+{
+    final switch (0)
+    {
+        case 1:
+            return;
+    }
+}
+// { dg-final { scan-tree-dump-times "_d_assert_msg" 1 "original" } }
+// { dg-final { scan-tree-dump-not "_d_throw" "original" } }