fix struct array pattern conversion (resolves #60)

test/basic/struct_array_inline.sv

@@ -0,0 +1,19 @@
+module top;
+    typedef struct packed {
+        bit a, b;
+    } T;
+
+    localparam T FOO [4] = '{
+        '{ 0, 0 },
+        '{ 0, 1 },
+        '{ 1, 0 },
+        '{ 1, 1 }
+    };
+
+    initial begin
+        $display(FOO[0].a);
+        $display(FOO[0].b);
+        $display(FOO[2].a);
+        $display(FOO[2].b);
+    end
+endmodule