Merge branch 'fix-caret-default'

Fix using default-constructed wxCaret.

See https://github.com/wxWidgets/wxWidgets/pull/2007

tests/controls/windowtest.cpp

@@ -136,10 +136,22 @@ TEST_CASE_METHOD(WindowTestCase, "Window::Mouse", "[window]")
     CHECK(m_window->GetCursor().IsOk());
 
 #if wxUSE_CARET
-    //A plain window doesn't have a caret
     CHECK(!m_window->GetCaret());
 
-    wxCaret* caret = new wxCaret(m_window, 16, 16);
+    wxCaret* caret;
+
+    // Try creating the caret in two different, but normally equivalent, ways.
+    SECTION("Caret 1-step")
+    {
+        caret = new wxCaret(m_window, 16, 16);
+    }
+
+    SECTION("Caret 2-step")
+    {
+        caret = new wxCaret();
+        caret->Create(m_window, 16, 16);
+    }
+
     m_window->SetCaret(caret);
 
     CHECK(m_window->GetCaret()->IsOk());