seminaries/mzapo/lcd/mzapo_lcdip: fix initial IP address value to indicate...

seminaries/mzapo/lcd/mzapo_lcdip: fix initial IP address value to indicate when no address is offered.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

seminaries/mzapo/lcd/mzapo_lcdip/mzapo_lcdip.c

@@ -4,7 +4,7 @@
 
   mzapo_lcdip.c       - main and only file
 
-  (C) Copyright 2004 - 2017 by Pavel Pisa
+  (C) Copyright 2004 - 2020 by Pavel Pisa
       edit:     jiri hubacek <hubacji1@fel.cvut.cz>
       e-mail:   pisa@cmp.felk.cvut.cz
       homepage: http://cmp.felk.cvut.cz/~pisa
@@ -370,7 +370,7 @@ int main(int argc, char *argv[])
   unsigned char *parlcd_mem_base;
   int i, j, k, blank;
   unsigned c;
-  unsigned ip_address;
+  unsigned ip_address = 0;
 
   uint8_t ip_bit, ip_byte_num, bl_y;