Compile fixes for GTK1 after recent work.

The whole of get_label_text_dimensions() should have been outside the
GTK 2 ifdef; I'd left a gtk_label_set_width_chars() unconditional; and
GDK1's gdk_window_set_background() lacks a const in its prototype.
Serves me right for not test-compiling in all three versions!

unix/gtkdlg.c

@@ -2443,7 +2443,9 @@ GtkWidget *layout_ctrls(struct dlgparam *dp, struct Shortcuts *scs,
 		GtkWidget *label, *container;
 
 		label = gtk_label_new(ctrl->generic.label);
+#if GTK_CHECK_VERSION(3,0,0)
                 gtk_label_set_width_chars(GTK_LABEL(label), 3);
+#endif
 
 		shortcut_add(scs, label, ctrl->listbox.shortcut,
 			     SHORTCUT_FOCUS, w);

unix/gtkfont.c

@@ -1988,6 +1988,46 @@ static void multifont_draw_text(unifont_drawctx *ctx, unifont *font, int x,
     }
 }
 
+/* ----------------------------------------------------------------------
+ * Utility routine used by the code below, and also gtkdlg.c.
+ */
+
+void get_label_text_dimensions(const char *text, int *width, int *height)
+{
+    /*
+     * Determine the dimensions of a piece of text in the standard
+     * font used in GTK interface elements like labels. We do this by
+     * instantiating an actual GtkLabel, and then querying its size.
+     *
+     * But GTK2 and GTK3 require us to query the size completely
+     * differently. I'm sure there ought to be an easier approach than
+     * the way I'm doing this in GTK3, too!
+     */
+    GtkWidget *label = gtk_label_new(text);
+
+#if GTK_CHECK_VERSION(3,0,0)
+    PangoLayout *layout = gtk_label_get_layout(GTK_LABEL(label));
+    PangoRectangle logrect;
+    pango_layout_get_extents(layout, NULL, &logrect);
+    if (width)
+        *width = logrect.width / PANGO_SCALE;
+    if (height)
+        *height = logrect.height / PANGO_SCALE;
+#else
+    GtkRequisition req;
+    gtk_widget_size_request(label, &req);
+    if (width)
+        *width = req.width;
+    if (height)
+        *height = req.height;
+#endif
+
+    g_object_ref_sink(G_OBJECT(label));
+#if GTK_CHECK_VERSION(2,10,0)
+    g_object_unref(label);
+#endif
+}
+
 #if GTK_CHECK_VERSION(2,0,0)
 
 /* ----------------------------------------------------------------------
@@ -2958,42 +2998,6 @@ static gint unifontsel_configure_area(GtkWidget *widget,
     return TRUE;
 }
 
-void get_label_text_dimensions(const char *text, int *width, int *height)
-{
-    /*
-     * Determine the dimensions of a piece of text in the standard
-     * font used in GTK interface elements like labels. We do this by
-     * instantiating an actual GtkLabel, and then querying its size.
-     *
-     * But GTK2 and GTK3 require us to query the size completely
-     * differently. I'm sure there ought to be an easier approach than
-     * the way I'm doing this in GTK3, too!
-     */
-    GtkWidget *label = gtk_label_new(text);
-
-#if GTK_CHECK_VERSION(3,0,0)
-    PangoLayout *layout = gtk_label_get_layout(GTK_LABEL(label));
-    PangoRectangle logrect;
-    pango_layout_get_extents(layout, NULL, &logrect);
-    if (width)
-        *width = logrect.width / PANGO_SCALE;
-    if (height)
-        *height = logrect.height / PANGO_SCALE;
-#else
-    GtkRequisition req;
-    gtk_widget_size_request(label, &req);
-    if (width)
-        *width = req.width;
-    if (height)
-        *height = req.height;
-#endif
-
-    g_object_ref_sink(G_OBJECT(label));
-#if GTK_CHECK_VERSION(2,10,0)
-    g_object_unref(label);
-#endif
-}
-
 unifontsel *unifontsel_new(const char *wintitle)
 {
     unifontsel_internal *fs = snew(unifontsel_internal);

unix/gtkwin.c

@@ -1869,7 +1869,12 @@ void set_gdk_window_background(GdkWindow *win, const GdkColor *col)
     rgba.alpha = 1.0;
     gdk_window_set_background_rgba(win, &rgba);
 #else
-    gdk_window_set_background(win, col);
+    {
+        /* For GTK1, which doesn't have a 'const' on
+         * gdk_window_set_background's second parameter type. */
+        GdkColor col_mutable = *col;
+        gdk_window_set_background(win, &col_mutable);
+    }
 #endif
 }