[AD] using suggest with multisampling

[Matthew Leverton <meffer@xxxxxxxxxx>]

Attached is a patch to:

* change examples to always use SUGGEST with the display option for
the number of samples.
* Fixes a typo in the skater demo.
* enables multisampling on the speed demo

Any objections?

--
Matthew Leverton

Index: demos/speed/main.c
===================================================================
--- demos/speed/main.c	(revision 14800)
+++ demos/speed/main.c	(working copy)
@@ -297,6 +297,9 @@
    }
 
    /* set the screen mode */
+   al_set_new_display_option(ALLEGRO_SAMPLE_BUFFERS, 1, ALLEGRO_SUGGEST);
+   al_set_new_display_option(ALLEGRO_SAMPLES, 4, ALLEGRO_SUGGEST);
+
    al_set_new_display_flags(display_flags);
    screen = al_create_display(w, h);
    if (!screen) {
Index: demos/skater/src/global.c
===================================================================
--- demos/skater/src/global.c	(revision 14800)
+++ demos/skater/src/global.c	(working copy)
@@ -203,11 +203,11 @@
    
    if (screen_samples > 1) {
       al_set_new_display_option(ALLEGRO_SAMPLE_BUFFERS, 1, ALLEGRO_SUGGEST);
-      al_set_new_display_option(ALLEGRO_SAMPLES, screen_samples, ALLEGRO_SAMPLES);
+      al_set_new_display_option(ALLEGRO_SAMPLES, screen_samples, ALLEGRO_SUGGEST);
    }
    else {
       al_set_new_display_option(ALLEGRO_SAMPLE_BUFFERS, 0, ALLEGRO_SUGGEST);
-      al_set_new_display_option(ALLEGRO_SAMPLES, 0, ALLEGRO_SAMPLES);
+      al_set_new_display_option(ALLEGRO_SAMPLES, 0, ALLEGRO_SUGGEST);
    }
 
    /* Attempt to set the selected colour depth and gfx mode. */
Index: examples/ex_multisample.c
===================================================================
--- examples/ex_multisample.c	(revision 14800)
+++ examples/ex_multisample.c	(working copy)
@@ -30,7 +30,7 @@
    al_install_keyboard();
 
    al_set_new_display_option(ALLEGRO_SAMPLE_BUFFERS, 1, ALLEGRO_REQUIRE);
-   al_set_new_display_option(ALLEGRO_SAMPLES, 4, ALLEGRO_REQUIRE);
+   al_set_new_display_option(ALLEGRO_SAMPLES, 4, ALLEGRO_SUGGEST);
    ms_display = al_create_display(200, 200);
    if (!ms_display) {
       printf("Multisampling not available.\n");
@@ -39,7 +39,7 @@
    al_set_window_title(ms_display, "Multisampling");
 
    al_set_new_display_option(ALLEGRO_SAMPLE_BUFFERS, 0, ALLEGRO_REQUIRE);
-   al_set_new_display_option(ALLEGRO_SAMPLES, 0, ALLEGRO_REQUIRE);
+   al_set_new_display_option(ALLEGRO_SAMPLES, 0, ALLEGRO_SUGGEST);
    display = al_create_display(200, 200);
    al_set_window_title(display, "Normal");
    
Index: examples/ex_draw.c
===================================================================
--- examples/ex_draw.c	(revision 14800)
+++ examples/ex_draw.c	(working copy)
@@ -308,7 +308,7 @@
 
    if (ex.samples) {
       al_set_new_display_option(ALLEGRO_SAMPLE_BUFFERS, 1, ALLEGRO_REQUIRE);
-      al_set_new_display_option(ALLEGRO_SAMPLES, ex.samples, ALLEGRO_REQUIRE);
+      al_set_new_display_option(ALLEGRO_SAMPLES, ex.samples, ALLEGRO_SUGGEST);
    }
    display = al_create_display(640, 640);
    if (!display) {