mapid.c (load_drivers): Fix segfault with missing conf data.

                        Forward port of r1478 on mapi_uninett branch.


git-svn-id: file:///home/svn/mapi/trunk@1479 8d5bb341-7cf1-0310-8cf6-ba355fef3186

src/mapid.c

@@ -2645,7 +2645,8 @@ load_drivers ()
 
 		  if(devgroupstr != NULL) devgroup = atoi(devgroupstr); else devgroup = 0;
 
-		  if (strlen (device) > 0 && strlen (driver) > 0)
+		  if (device && strlen(device) > 0 &&
+		      driver && strlen(driver) > 0) 
 		    {
 		  if (devgroup == onlydevgroup) {
 		      if ((handle = load_driver (drvpath, driver)) != NULL)
@@ -2801,11 +2802,13 @@ load_drivers ()
 				}
 	
 		      //Quick fix for a bug in the config file parser
-		      if(format!=NULL)
-				  {
-				  device[0] = '\0';
-				  driver[0] = '\0';
-				  if(description!=NULL)
+		      if (format!=NULL) 
+			          {
+				  if (device!=NULL)
+				    device[0] = '\0';
+				  if (driver!=NULL)
+				    driver[0] = '\0';
+				  if (description!=NULL)
 				    description[0] = '\0';
 				  }
 		    }