Fix wxWrapSizer minimal size calculation.

Add a unit test checking that wxWrapSizer::CalcMin() returns the expected
results.

Closes #12464.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66862 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/wincmn.cpp

@@ -853,6 +853,16 @@ wxSize wxWindowBase::GetWindowBorderSize() const
     return size*2;
 }
 
+bool
+wxWindowBase::InformFirstDirection(int direction,
+                                   int size,
+                                   int availableOtherDir)
+{
+    return GetSizer() && GetSizer()->InformFirstDirection(direction,
+                                                          size,
+                                                          availableOtherDir);
+}
+
 wxSize wxWindowBase::GetEffectiveMinSize() const
 {
     // merge the best size with the min size, giving priority to the min size