GHCi can't show bangstars when the file is compiled.

[Masse]

GHCi and ghc --interactive can't browse *Module if the file is compiled. This renders the omnifunc useless as the autocommand QuickFixCmdPost? runs GHC_BrowseAll after running make.

How to reproduce:

Run :GHCReload, import a new module, run :make and try to C_xC-o a function from the new imported module.

Expected behaviour:

The cache should be updated and C-xC-o should return a list of possible completions.

Real behaviour:

Cache isn't updated and the symbols aren't found.

Possible fix:

Instead of updating the cache with every :make, update it with every :w (see patch)