Fix internal compiler error for arrays of recursive structs.

test/libsolidity/syntaxTests/structs/recursion/static_array_of_recursive_structs.sol

@@ -0,0 +1,10 @@
+contract Test {
+    struct RecursiveStruct {
+        RecursiveStruct[] vals;
+    }
+
+    function func() private pure {
+        RecursiveStruct[1] memory val;
+        val;
+    }
+}