Explicitely initialize global variables to avoid segfaults when calling

sane_init/sane_exit more than once.

ChangeLog

@@ -4,7 +4,9 @@
 	  doc/descriptions/gt68xx.desc doc/gt68xx/gt68xx.CHANGES:
 	  Added vid/pid 0x07b3/0x0400 to gt68xx.conf also. Added indormation
 	  about Medion 4394. Mention ma1509 backend. Fix segfault when calling
-	  sane_open with an empty device name.
+	  sane_open with an empty device name. Explicitely initialize global
+	  variables to avoid segfaults when calling sane_init/sane_exit more
+	  than once.
 	* backend/net.c doc/descriptions/net.desc: Initialize global variables
 	  in sane_init to avoid segmentation faults when sane_init/sane_exit is
 	  run more than once.

backend/gt68xx.c

@@ -932,6 +932,14 @@ sane_init (SANE_Int * version_code, SANE_Auth_Callback authorize)
 
   sanei_usb_init ();
 
+  num_devices = 0;
+  first_dev = 0;
+  first_handle = 0;
+  devlist = 0;
+  new_dev = 0;
+  new_dev_len = 0;
+  new_dev_alloced = 0;
+
   fp = sanei_config_open (GT68XX_CONFIG_FILE);
   if (!fp)
     {
@@ -1139,6 +1147,7 @@ sane_exit (void)
       gt68xx_device_free (dev);
     }
   first_dev = 0;
+  first_handle = 0;
   if (devlist)
     free (devlist);
   devlist = 0;

doc/gt68xx/gt68xx.CHANGES

@@ -6,6 +6,8 @@ V 1.0-40 (2003-02-22)
 - Added indormation about Medion 4394.
 - Mention ma1509 backend.
 - Fix segfault when calling sane_open with an empty device name.
+- Explicitely initialize global variables to avoid segfaults when calling
+  sane_init/sane_exit more than once.
 
 V 1.0-39 (2003-02-16)