[LyX/master] Add FIXME

[Richard Kimberly Heck]

commit a8de13632a06ffa08eb39aaf9e83535a1554bbd8
Author: Richard Kimberly Heck <rikiheck at lyx.org>
Date:   Tue Sep 8 18:01:07 2020 -0400

    Add FIXME
---
 src/ConverterCache.cpp |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/ConverterCache.cpp b/src/ConverterCache.cpp
index c601c3f..bee0253 100644
--- a/src/ConverterCache.cpp
+++ b/src/ConverterCache.cpp
@@ -244,6 +244,8 @@ void ConverterCache::init()
 	cache_dir = FileName(addName(package().user_support().absFileName(), "cache"));
 	if (!cache_dir.exists())
 		if (!cache_dir.createDirectory(0700)) {
+			// FIXME This should really be displayed as a message. But the GUI
+			// does not exist yet.
 			lyxerr << "Could not create cache directory `"
 			       << cache_dir << "'." << endl;
 			exit(EXIT_FAILURE);