tests: Fix build with GTK+ < 2.17.7

gtk_widget_get_allocation() was added in that version.

tests/examples/camerabin/gst-camera.c

@@ -45,6 +45,14 @@
 #include <time.h>
 #include <glib/gstdio.h>        // g_fopen()
 
+#if !GTK_CHECK_VERSION (2, 17, 7)
+static void
+gtk_widget_get_allocation (GtkWidget * w, GtkAllocation * a)
+{
+  *a = w->allocation;
+}
+#endif
+
 /*
  * enums, typedefs and defines
  */

tests/icles/metadata_editor.c

@@ -54,6 +54,14 @@
 
 #include <gst/gst.h>
 
+#if !GTK_CHECK_VERSION (2, 17, 7)
+static void
+gtk_widget_get_allocation (GtkWidget * w, GtkAllocation * a)
+{
+  *a = w->allocation;
+}
+#endif
+
 /*
  * Global constants
  */