inspector: Fix the build

I forgot to test the previous commit with -Wimplicit-function-delcaration,
and it promptly broke.

gtk/inspector/general.c

@@ -20,7 +20,10 @@
 
 #include "general.h"
 
+#include "gtkadjustment.h"
 #include "gtkdebug.h"
+#include "gtklabel.h"
+#include "gtkscale.h"
 #include "gtkswitch.h"
 #include "gtklistbox.h"
 #include "gtkprivate.h"

gtk/inspector/object-hierarchy.c

@@ -25,8 +25,9 @@
 
 #include "object-hierarchy.h"
 
-#include "gtktreeview.h"
+#include "gtktreeselection.h"
 #include "gtktreestore.h"
+#include "gtktreeview.h"
 
 
 enum

gtk/inspector/resource-list.c

@@ -20,6 +20,8 @@
 
 #include "resource-list.h"
 
+#include "gtklabel.h"
+#include "gtkstack.h"
 #include "gtktextbuffer.h"
 #include "gtktreestore.h"
 #include "gtktreeselection.h"

gtk/inspector/widget-tree.c

@@ -39,6 +39,7 @@
 #include "gtkmenuitem.h"
 #include "gtksettings.h"
 #include "gtktextview.h"
+#include "gtktreeselection.h"
 #include "gtktreestore.h"
 #include "gtkwidgetprivate.h"
 

gtk/inspector/window.c

@@ -44,6 +44,8 @@
 #include "menu.h"
 #include "gestures.h"
 
+#include "gtknotebook.h"
+#include "gtkwindowgroup.h"
 
 G_DEFINE_TYPE (GtkInspectorWindow, gtk_inspector_window, GTK_TYPE_WINDOW)