r.stream.segment: sync param name to other r.stream.* commands (trac https://trac.osgeo.org/grass/ticket/2238)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@59509 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.stream.segment/main.c

@@ -60,7 +60,7 @@ int main(int argc, char *argv[])
     G_add_keyword(_("stream divide"));
 
     in_stm_opt = G_define_standard_option(G_OPT_R_INPUT);
-    in_stm_opt->key = "stream_raster";
+    in_stm_opt->key = "stream_rast";
     in_stm_opt->description = _("Name of input streams mask raster map");
 
     in_dir_opt = G_define_standard_option(G_OPT_R_INPUT);