accept an argv[0] of "" and assume "dot". From Gvedit's use on Windows.

diff --git a/lib/common/input.c b/lib/common/input.c
index ffc3065c61d8a384a70aab5819b5000dacd840db..7281be8193f60f9177d83d09d20426d909a61156 100644 (file)
--- a/lib/common/input.c
+++ b/lib/common/input.c
@@ -259,13 +259,16 @@ void dotneato_args_initialize(GVC_t * gvc, int argc, char **argv)
        exit (0);
 
     layout = gvc->common.cmdname;
-    if (streq(layout, "dot_static") || streq(layout, "dot_builtins"))
+    if (streq(layout, "dot_static")
+           || streq(layout, "dot_builtins")
+           || streq(layout, "")   /* when run as a process from Gvedit on Windows */
+       )
         layout = "dot";
     i = gvlayout_select(gvc, layout);
     if (i == NO_SUPPORT) {
        fprintf(stderr, "There is no layout engine support for \"%s\"\n", layout);
         if (streq(layout, "dot"))
-           fprintf(stderr, "Perhaps \"%s -c\" needs to be run (with installer's privileges) to register the plugins?\n", gvc->common.cmdname);
+           fprintf(stderr, "Perhaps \"dot -c\" needs to be run (with installer's privileges) to register the plugins?\n");
        else 
            fprintf(stderr, "Use one of:%s\n", gvplugin_list(gvc, API_layout, ""));
        exit(1);