Protect pll scrips agains missing information in firmware memory

Scripts/pll_status_small.py

@@ -306,11 +306,13 @@ def draw_menu(stdscr, dev):
     val = val.replace("\"","")
     val = val.split(",")[0]
     win1.addstr("                           Running on : " + val, CYAN | curses.A_BOLD)
-    #try: 
+    #try:
     vers = fpga.read_version()
     #except ValueError:
     #vers = { "design_version": "N/A" , "server" : "N/A" , "links" : "N/A" } 
-        
+    if not "server" in vers.keys(): vers["server"] = 'N/A'
+    if not "links" in vers.keys(): vers["links"] = 'N/A'
+
     win1.addstr(2 , 1 , "    Firmware version : " + vers[ 'design_version' ] , CYAN | curses.A_BOLD ) 
     win1.addstr( ", for server : " + vers[ 'server' ] , CYAN | curses.A_BOLD ) 
     win1.addstr( ", and number of links : " + vers[ 'links' ] , CYAN | curses.A_BOLD )