don't set the path to ~/untitled.blend on initializing the WM, this isn't well defined how this behavior should work,

existing behavior was inconsistent since loading a new file would set the path to "".

source/blender/windowmanager/intern/wm_init_exit.c

@@ -177,8 +177,11 @@ void WM_init(bContext *C, int argc, char **argv)
 	
 	read_history();
 
+	/* allow a path of "", this is what happens when making a new file */
+	/*
 	if(G.main->name[0] == 0)
 		BLI_make_file_string("/", G.main->name, BLI_getDefaultDocumentFolder(), "untitled.blend");
+	*/
 
 	BLI_strncpy(G.lib, G.main->name, FILE_MAX);