Add missing checks.

5 files changed, 46 insertions, 9 deletions

diff --git a/src/gui/theme.cpp b/src/gui/theme.cpp
index 8aab63728..98251948f 100644
--- a/src/gui/theme.cpp
+++ b/src/gui/theme.cpp
@@ -99,8 +99,11 @@ void Skin::updateAlpha(float minimumOpacityAllowed)
         std::max(static_cast<double>(minimumOpacityAllowed),
         static_cast<double>(Client::getGuiAlpha())));
 
-    for_each(mBorder.grid, mBorder.grid + 9,
-             std::bind2nd(std::mem_fun(&Image::setAlpha), alpha));
+    for (int i = 0; i < 9; i++)
+    {
+        if (mBorder.grid[i])
+            mBorder.grid[i]->setAlpha(alpha);
+    }
 
     if (mCloseImage)
         mCloseImage->setAlpha(alpha);
diff --git a/src/gui/widgets/popup.cpp b/src/gui/widgets/popup.cpp
index 7519d1583..bc15a4c2c 100644
--- a/src/gui/widgets/popup.cpp
+++ b/src/gui/widgets/popup.cpp
@@ -142,13 +142,28 @@ void Popup::setLocationRelativeTo(gcn::Widget *widget)
 
 void Popup::setMinWidth(int width)
 {
-    mMinWidth = width > mSkin->getMinWidth() ? width : mSkin->getMinWidth();
+    if (mSkin)
+    {
+        mMinWidth = width > mSkin->getMinWidth()
+            ? width : mSkin->getMinWidth();
+    }
+    else
+    {
+        mMinWidth = width;
+    }
 }
 
 void Popup::setMinHeight(int height)
 {
-    mMinHeight = height > mSkin->getMinHeight() ?
-        height : mSkin->getMinHeight();
+    if (mSkin)
+    {
+        mMinHeight = height > mSkin->getMinHeight() ?
+            height : mSkin->getMinHeight();
+    }
+    else
+    {
+        mMinHeight = height;
+    }
 }
 
 void Popup::setMaxWidth(int width)
diff --git a/src/gui/widgets/scrollarea.cpp b/src/gui/widgets/scrollarea.cpp
index a78048314..0be492ee6 100644
--- a/src/gui/widgets/scrollarea.cpp
+++ b/src/gui/widgets/scrollarea.cpp
@@ -148,7 +148,8 @@ void ScrollArea::init()
             }
         }
 
-        textbox->decRef();
+        if (textbox)
+            textbox->decRef();
 
         // Load vertical scrollbar skin
         Image *vscroll = Theme::getImageFromTheme("vscroll_grey.png");
diff --git a/src/gui/widgets/tab.cpp b/src/gui/widgets/tab.cpp
index 6750ffbbc..73ffff30e 100644
--- a/src/gui/widgets/tab.cpp
+++ b/src/gui/widgets/tab.cpp
@@ -108,6 +108,9 @@ void Tab::init()
         for (mode = 0; mode < TAB_COUNT; mode++)
         {
             tab[mode] = Theme::getImageFromTheme(data[mode].file);
+            if (!tab[mode])
+                continue;
+
             a = 0;
             for (y = 0; y < 3; y++)
             {
diff --git a/src/gui/widgets/window.cpp b/src/gui/widgets/window.cpp
index 3531ac245..14f39a4c3 100644
--- a/src/gui/widgets/window.cpp
+++ b/src/gui/widgets/window.cpp
@@ -273,13 +273,28 @@ void Window::setLocationRelativeTo(ImageRect::ImagePosition position,
 
 void Window::setMinWidth(int width)
 {
-    mMinWinWidth = width > mSkin->getMinWidth() ? width : mSkin->getMinWidth();
+    if (mSkin)
+    {
+        mMinWinWidth = width > mSkin->getMinWidth()
+            ? width : mSkin->getMinWidth();
+    }
+    else
+    {
+        mMinWinWidth = width;
+    }
 }
 
 void Window::setMinHeight(int height)
 {
-    mMinWinHeight = height > mSkin->getMinHeight() ?
-                    height : mSkin->getMinHeight();
+    if (mSkin)
+    {
+        mMinWinHeight = height > mSkin->getMinHeight() ?
+                        height : mSkin->getMinHeight();
+    }
+    else
+    {
+        mMinWinHeight = height;
+    }
 }
 
 void Window::setMaxWidth(int width)