(rpc) fix crash when quickly toggling rpc on/off reported by John_Clay

libtransmission/rpc-server.c

@@ -112,7 +112,8 @@ rpcPulse( int socket UNUSED, short action UNUSED, void * vserver )
 
     assert( server );
 
-    shttpd_poll( server->ctx, 1 );
+    if( server->ctx )
+        shttpd_poll( server->ctx, 1 );
 
     /* set a timer for the next pulse */
     if( EVBUFFER_LENGTH( server->in ) || EVBUFFER_LENGTH( server->out ) )

libtransmission/trevent.c

@@ -117,7 +117,7 @@ readFromPipe( int fd, short eventType, void * veh )
         {
             assert( 0 && "unhandled command type!" );
             break;
-	}
+        }
     }
 }