Properly set Compare button icon

This relates to Bug 2143

kompare/kompare_shell.cpp

@@ -399,7 +399,7 @@ void KompareShell::slotFileCompareFiles()
 	dialog->setFirstGroupBoxTitle( i18n( "Source" ) );
 	dialog->setSecondGroupBoxTitle( i18n( "Destination" ) );
 
-	KGuiItem compareGuiItem( i18n( "Compare" ), TQString(), i18n( "Compare these files or folders" ), i18n( "If you have entered 2 filenames or 2 folders in the fields in this dialog then this button will be enabled and pressing it will start a comparison of the entered files or folders. " ) );
+	KGuiItem compareGuiItem( i18n( "Compare" ), "button_ok", i18n( "Compare these files or folders" ), i18n( "If you have entered 2 filenames or 2 folders in the fields in this dialog then this button will be enabled and pressing it will start a comparison of the entered files or folders. " ) );
 	dialog->setButtonOK( compareGuiItem );
 
 	dialog->setGroup( "Recent Compare Files" );

kompare/main.cpp

@@ -186,7 +186,7 @@ int main(int argc, char *argv[])
 			dialog->setFirstGroupBoxTitle( i18n( "Source" ) );
 			dialog->setSecondGroupBoxTitle( i18n( "Destination" ) );
 
-			KGuiItem compareGuiItem( i18n( "Compare" ), TQString(), i18n( "Compare these files or folder" ), i18n( "If you have entered 2 filenames or 2 folders in the fields in this dialog then this button will be enabled and pressing it will start a comparison of the entered files or folders. " ) );
+			KGuiItem compareGuiItem( i18n( "Compare" ), "button_ok", i18n( "Compare these files or folder" ), i18n( "If you have entered 2 filenames or 2 folders in the fields in this dialog then this button will be enabled and pressing it will start a comparison of the entered files or folders. " ) );
 			dialog->setButtonOK( compareGuiItem );
 
 			dialog->setGroup( "Recent Compare Files" );