fix mode list for infrared scans

ChangeLog

@@ -1,3 +1,6 @@
+2013-06-27 Rolf Bensch <rolf at bensch hyphen online dot de>
+	* backend/pixma.c: fix mode list for infrared scans
+
 2013-06-27 m. allan noah <kitno455 at gmail dot com>
 	* backend/fujitsu*: backend v117
 	- default buffer-mode to off

backend/pixma.c

@@ -384,7 +384,7 @@ create_mode_list (pixma_sane_t * ss)
           i++;
         }
     }
-  if (tpu && (cfg->cap & PIXMA_CAP_TPUIR))
+  if (tpu && (cfg->cap & PIXMA_CAP_TPUIR) == PIXMA_CAP_TPUIR)
     {
       ss->mode_list[i] = SANE_I18N ("Infrared");
       ss->mode_map[i] = PIXMA_SCAN_MODE_TPUIR;