avoid setting 0 sizes

src/qtgui/advsearch.ui

@@ -95,12 +95,6 @@
                 <property name="sizeType">
                   <enum>Expanding</enum>
                 </property>
-                <property name="sizeHint">
-                  <size>
-                    <width>0</width>
-                    <height>0</height>
-                  </size>
-                </property>
               </spacer>
               <widget class="QPushButton">
                 <property name="name">

src/qtgui/sort.ui

@@ -8,8 +8,8 @@
         <rect>
             <x>0</x>
             <y>0</y>
-            <width>0</width>
-            <height>0</height>
+            <width>200</width>
+            <height>100</height>
         </rect>
     </property>
     <property name="caption">

src/qtgui/spell.ui

@@ -22,8 +22,8 @@
     </property>
     <property name="minimumSize">
         <size>
-            <width>0</width>
-            <height>0</height>
+            <width>100</width>
+            <height>100</height>
         </size>
     </property>
     <property name="caption">

src/qtgui/uiprefs.ui

@@ -8,8 +8,8 @@
         <rect>
             <x>0</x>
             <y>0</y>
-            <width>0</width>
-            <height>0</height>
+            <width>400</width>
+            <height>300</height>
         </rect>
     </property>
     <property name="caption">