Test mode finder

Add a new `moder.c` based on `includer.c` to test getting a mode and
then getting an action for a mode mapping.

Doesn't completely work currently. Right now all I get is this output:

    $ ./moder
    2
    Segmentation fault: 11

Clearly I'm messing up something with the pointer in
`c_run_key_action()`. Not sure what it is yet.

Changed `CKeyActionResult.in_mode` to be a `Trigger` instead of a
`HeadphoneButton` list. That allows us to pass it directly into the
second argument of `c_run_key_action()` without converting.

But maybe the pointer value isn't living long enough? Not sure what the
problem is yet.

1 files changed, 4 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 5f1288b..c5bd2e2 100644
--- a/Makefile
+++ b/Makefile
@@ -8,6 +8,9 @@ $(LIB): $(SOURCE_FILES)
 includer: clean $(LIB)
 	gcc -o $@ includer.c $(LIB)
 
+moder: clean $(LIB)
+	gcc -o $@ $@.c $(LIB)
+
 .PHONY: clean
 clean:
-	rm -f includer
+	rm -f includer moder