Fix error read jpeg.

backend/escl/escl_jpeg.c

@@ -235,7 +235,6 @@ get_JPEG_data(capabilities_t *scanner, int *width, int *height, int *bps)
     *width = w;
     *height = h;
     *bps = cinfo.output_components;
-    jpeg_finish_decompress(&cinfo);
     jpeg_destroy_decompress(&cinfo);
     fclose(scanner->tmp);
     scanner->tmp = NULL;