improve buyselldialog class.

2 files changed, 7 insertions, 5 deletions

diff --git a/src/gui/buyselldialog.cpp b/src/gui/buyselldialog.cpp
index 32e762c1d..1c8c81b52 100644
--- a/src/gui/buyselldialog.cpp
+++ b/src/gui/buyselldialog.cpp
@@ -45,7 +45,7 @@ BuySellDialog::BuySellDialog(const int npcId) :
     init();
 }
 
-BuySellDialog::BuySellDialog(std::string nick) :
+BuySellDialog::BuySellDialog(const std::string &nick) :
     // TRANSLATORS: shop window name
     Window(_("Shop"), false, nullptr, "buysell.xml"),
     gcn::ActionListener(),
@@ -84,9 +84,11 @@ void BuySellDialog::init()
         add(btn);
         x += btn->getWidth() + buttonPadding;
     }
-    mBuyButton->requestFocus();
-
-    setContentSize(x, 2 * y + mBuyButton->getHeight());
+    if (mBuyButton)
+    {
+        mBuyButton->requestFocus();
+        setContentSize(x, 2 * y + mBuyButton->getHeight());
+    }
 
     center();
     setDefaultSize();
diff --git a/src/gui/buyselldialog.h b/src/gui/buyselldialog.h
index ef3a98f18..391d90793 100644
--- a/src/gui/buyselldialog.h
+++ b/src/gui/buyselldialog.h
@@ -45,7 +45,7 @@ class BuySellDialog final : public Window, public gcn::ActionListener
          */
         explicit BuySellDialog(const int npcId);
 
-        explicit BuySellDialog(std::string nick);
+        explicit BuySellDialog(const std::string &nick);
 
         A_DELETE_COPY(BuySellDialog)