including of dependencies in makefile from library external

[letzfets]

The external library in mode "list and make" or "list" creates a makefile. This makefile contains in line 9:

include $(ALL_FIGURE_NAMES:%=%.dep)

When running for the first time, it creates the following error:
<main.makefile:9: main-figure0.dep: No such file or directory>
Replacing this line with

-include $(ALL_FIGURE_NAMES:%=%.dep)

would fix it. The minus sign in front tells make, not to complain if the file does not exist, but include it, if it is there.
#external