Simplify after recent changes by adding DoSetDigitsAndUpdate()

There is no need for a separate UpdateAfterDigitsChange(), it is always
called together with DoSetDigits().

include/wx/generic/spinctlg.h

@@ -430,11 +430,11 @@ private:
     // specified increment without loss of precision.
     static unsigned DetermineDigits(double inc);
 
-    // Set the number of digits and the format unconditionally.
+    // Just set the number of digits and the format unconditionally.
     void DoSetDigits(unsigned digits);
 
-    // Update the appearance after the number of digits has changed.
-    void UpdateAfterDigitsChange();
+    // Call DoSetDigits() and update the appearance.
+    void DoSetDigitsAndUpdate(unsigned digits);
 
 
     wxString m_format;

src/generic/spinctlg.cpp

@@ -759,11 +759,7 @@ void wxSpinCtrlDouble::SetIncrement(double inc)
     // could be undesirable, but we do increase it if the current number is not
     // high enough to show the numbers without losing precision.
     if ( digits > m_digits )
-    {
-        DoSetDigits(digits);
-
-        UpdateAfterDigitsChange();
-    }
+        DoSetDigitsAndUpdate(digits);
 }
 
 void wxSpinCtrlDouble::SetDigits(unsigned digits)
@@ -773,13 +769,13 @@ void wxSpinCtrlDouble::SetDigits(unsigned digits)
     if ( digits == m_digits )
         return;
 
-    DoSetDigits(digits);
-
-    UpdateAfterDigitsChange();
+    DoSetDigitsAndUpdate(digits);
 }
 
-void wxSpinCtrlDouble::UpdateAfterDigitsChange()
+void wxSpinCtrlDouble::DoSetDigitsAndUpdate(unsigned digits)
 {
+    DoSetDigits(digits);
+
     ResetTextValidator();
     m_textCtrl->InvalidateBestSize();