terminal: Only set title if asprintf succeeded

Handles potential out of memory situation by skipping the title update.
This fixes the following warning:

  terminal.c: In function ‘resize_handler’:
  terminal.c:851:11: warning: ignoring return value of ‘asprintf’,
  declared with attribute warn_unused_result [-Wunused-result]

Signed-off-by: Bryce Harrington <b.harrington@samsung.com>

clients/terminal.c

@@ -848,10 +848,11 @@ resize_handler(struct widget *widget,
 		width = columns * terminal->average_width + m;
 		height = rows * terminal->extents.height + m;
 		widget_set_size(terminal->widget, width, height);
-		asprintf(&p, "%s — [%dx%d]", terminal->title, columns, rows);
+		if (asprintf(&p, "%s — [%dx%d]", terminal->title, columns, rows) > 0) {
 		    window_set_title(terminal->window, p);
 		    free(p);
 		}
+	}
 
 	terminal_resize_cells(terminal, columns, rows);
 }