From 0371dc96647f594b403557bd85298a934f110976 Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Tue, 14 Jan 2020 20:51:06 +0100
Subject: [PATCH] The OAK OTi graphic card code no longer loads the ROM if the
 ROM file name pointer is NULL.

---
 src/video/vid_oak_oti.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/video/vid_oak_oti.c b/src/video/vid_oak_oti.c
index 467d2a67c..2addd8b32 100644
--- a/src/video/vid_oak_oti.c
+++ b/src/video/vid_oak_oti.c
@@ -372,8 +372,10 @@ oti_init(const device_t *info)
 		break;
     }
 
-    rom_init(&oti->bios_rom, romfn,
-	     0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
+    if (romfn != NULL) {
+	rom_init(&oti->bios_rom, romfn,
+		 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
+    }
 
     oti->vram_mask = (oti->vram_size << 10) - 1;