r.out.gdal: close raster after export

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@58304 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.out.gdal/export_band.c

@@ -445,6 +445,8 @@ int export_band(GDALDatasetH hMEMDS, int band,
 	}
     }
 
+    Rast_close(fd);
+
     G_free(bufer);
 
     return ret;