g.gui: using interpreter path rather than script path as zeroth argument to fix max os x posix_spawn error (No such file or directory)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@57537 15284696-431f-4ddb-bdfa-cd5b030d7da7

general/g.gui/main.c

@@ -114,11 +114,11 @@ int main(int argc, char *argv[])
     if (strcmp(type->answer, "wxpython") == 0) {
 	sprintf(progname, "%s/etc/gui/wxpython/wxgui.py", G_gisbase());
 	if (rc_file->answer) {
-	    G_spawn_ex(getenv("GRASS_PYTHON"), progname, progname,
+	    G_spawn_ex(getenv("GRASS_PYTHON"), getenv("GRASS_PYTHON"), progname,
 		    "--workspace", rc_file->answer, SF_BACKGROUND, NULL);
 	}
 	else {
-	    G_spawn_ex(getenv("GRASS_PYTHON"), progname, progname,
+	    G_spawn_ex(getenv("GRASS_PYTHON"), getenv("GRASS_PYTHON"), progname,
 		    SF_BACKGROUND, NULL);
 	}
     }