libraster: improved error msg if compression is not supported

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@73158 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/raster/open.c

@@ -232,7 +232,7 @@ int Rast__open_old(const char *name, const char *mapset)
     }
     /* test if compressor type is supported */
     if (!G_check_compressor(cellhd.compressed)) {
-	G_fatal_error(_("Compression with %s is not supported"), G_compressor_name(cellhd.compressed));
+	G_fatal_error(_("Compression with %s is not supported in this GRASS GIS installation"), G_compressor_name(cellhd.compressed));
     }
 
     if (cellhd.proj != R__.rd_window.proj)