[vdr] Include Path in Makefile (VDR >=1.7.15)

[Joachim Wilke]

I'm just wondering, if there has happened a mistake in updating the
Makefile in VDR 1.7.15.

The HISTORY file states:
"Include paths are now added instead of overwriting INCLUDES in the Makefile"

However, in the Makefile changes:
-INCLUDES = -I/usr/include/freetype2
+INCLUDES ?= -I/usr/include/freetype2

Shouldn't that be += instead of ?=.

In my case, my IDE sets INCLUDES with some custom stuff. Therefore the
Makefile does not touch INCLUDES any more and I get an error.
-- 
Best Regards,
Joachim.