FindFLTK: Safe to include multiple times
FindFLTK could store multiple entries in FLTK_INCLUDE_DIR
,
and when re-executed would stored into FLTK_DIR
which had
uses which presumed single entries.
Fixes #13198 (closed)
FindFLTK could store multiple entries in FLTK_INCLUDE_DIR
,
and when re-executed would stored into FLTK_DIR
which had
uses which presumed single entries.
Fixes #13198 (closed)