don't need to track this separately

the only time alternate_cr will be set is when the alternate screen is
enabled, so just use that

2 files changed, 2 insertions, 5 deletions

diff --git a/display.c b/display.c
index 0b3d1ec..240a89a 100644
--- a/display.c
+++ b/display.c
@@ -355,12 +355,11 @@ void runes_display_restore_cursor(RunesTerm *t)
 
 void runes_display_use_alternate_buffer(RunesTerm *t)
 {
-    if (t->alternate) {
+    if (t->alternate_cr) {
         return;
     }
 
     runes_display_save_cursor(t);
-    t->alternate = 1;
     t->alternate_cr = t->cr;
     t->cr = NULL;
     t->xpixel = -1;
@@ -370,12 +369,11 @@ void runes_display_use_alternate_buffer(RunesTerm *t)
 
 void runes_display_use_normal_buffer(RunesTerm *t)
 {
-    if (!t->alternate) {
+    if (!t->alternate_cr) {
         return;
     }
 
     runes_display_restore_cursor(t);
-    t->alternate = 0;
     cairo_destroy(t->cr);
     t->cr = t->alternate_cr;
     t->alternate_cr = NULL;
diff --git a/term.h b/term.h
index cf52dc6..34e9aff 100644
--- a/term.h
+++ b/term.h
@@ -35,7 +35,6 @@ struct runes_term {
 
     char hide_cursor;
     char unfocused;
-    char alternate;
 
     char application_keypad;
     char application_cursor;