Remove illogical assertion in ftp.c

A call to assert(1) will always fail and cause Wget to crash. If such a
situation does arise, Wget should invoke abort() and provide a useful
error message to the user prior to exiting.

src/ChangeLog

@@ -1,3 +1,7 @@
+2014-12-04  Darshit Shah  <darnir@gmail.com>
+
+	* ftp.c (getftp): Remove a call to assert(1) and replace with error message
+
 2014-12-04  Darshit Shah  <darnir@gmail.com>
 
 	* wget.h: Define MIX and MAX macros globally for all files

src/ftp.c

@@ -724,8 +724,10 @@ Error in server response, closing control connection.\n"));
                 break;
 
               default:
-                /* Can't happen. */
-                assert (1);
+                logprintf (LOG_ALWAYS, _("Logically impossible section reached in getftp()"));
+                logprintf (LOG_ALWAYS, _("cwd_count: %d\ncwd_start: %d\ncwd_end: %d\n"),
+                                         cwd_count, cwd_start, cwd_end);
+                abort ();
             }
 
           if (!opt.server_response)