agp: more boolean conversions.

Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index 6800b7e..0235659 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -325,7 +325,7 @@
 out:
 	ret = 0;
 out_err:
-	mem->is_flushed = 1;
+	mem->is_flushed = true;
 	return ret;
 }
 
@@ -795,7 +795,7 @@
 out:
 	ret = 0;
 out_err:
-	mem->is_flushed = 1;
+	mem->is_flushed = true;
 	return ret;
 }
 
@@ -1022,7 +1022,7 @@
  out:
 	ret = 0;
  out_err:
-	mem->is_flushed = 1;
+	mem->is_flushed = true;
 	return ret;
 }