Move print preview command to gtksettings.c

Having this in the source seems more appropriate.

configure.ac

@@ -399,7 +399,6 @@ if test "x$enable_quartz_backend" = xyes; then
   # Pull in gio-unix for GDesktopAppInfo usage, see at least
   # gdkapplaunchcontext-x11.c
   have_gio_unix=yes
-
 else
   AM_CONDITIONAL(USE_QUARTZ, false)
 fi

gtk/Makefile.am

@@ -2,12 +2,6 @@ AUTOMAKE_OPTIONS = subdir-objects
 
 include $(top_srcdir)/Makefile.decl
 
-if USE_QUARTZ
-GTK_PRINT_PREVIEW_COMMAND="open -a /Applications/Preview.app %f"
-else
-GTK_PRINT_PREVIEW_COMMAND="evince --unlink-tempfile --preview --print-settings %s %f"
-endif
-
 AM_CPPFLAGS =						\
 	-DG_LOG_DOMAIN=\"Gtk\"				\
 	-DGTK_LIBDIR=\"$(libdir)\"			\
@@ -19,12 +13,11 @@ AM_CPPFLAGS =						\
 	-DGTK_HOST=\"$(host)\"				\
 	-DGTK_COMPILATION				\
 	-DGTK_PRINT_BACKENDS=\"$(GTK_PRINT_BACKENDS)\"	\
-	-DGTK_PRINT_PREVIEW_COMMAND=\"$(GTK_PRINT_PREVIEW_COMMAND)\"	\
+	-DGTK_PRINT_BACKEND_ENABLE_UNSUPPORTED		\
 	-I$(top_builddir)				\
 	-I$(top_builddir)/gtk				\
 	-I$(top_srcdir) 				\
 	-I$(top_srcdir)/gdk				\
-	-DGTK_PRINT_BACKEND_ENABLE_UNSUPPORTED		\
 	$(GMODULE_CFLAGS)				\
 	$(GTK_DEBUG_FLAGS)				\
 	$(GDK_HIDDEN_VISIBILITY_CFLAGS)			\

gtk/gtksettings.c

@@ -59,6 +59,12 @@
 
 #include "deprecated/gtkrc.h"
 
+#ifdef GDK_WINDOWING_QUARTZ
+#define PRINT_PREVIEW_COMMAND "open -a /Applications/Preview.app %f"
+#else
+#define PRINT_PREVIEW_COMMAND "evince --unlink-tempfile --preview --print-settings %s %f"
+#endif
+
 /**
  * SECTION:gtksettings
  * @Short_description: Sharing settings between applications
@@ -987,7 +993,7 @@ gtk_settings_class_init (GtkSettingsClass *class)
                                              g_param_spec_string ("gtk-print-preview-command",
                                                                   P_("Default command to run when displaying a print preview"),
                                                                   P_("Command to run when displaying a print preview"),
-                                                                  GTK_PRINT_PREVIEW_COMMAND,
+                                                                  PRINT_PREVIEW_COMMAND,
                                                                   GTK_PARAM_READWRITE),
                                              NULL);
   g_assert (result == PROP_PRINT_PREVIEW_COMMAND);