fix for bug #337785: Haskell intendation segmentation fault
Review Request #119724 - Created Aug. 12, 2014 and submitted
KateHighlighting is expected to always have at least one default KateHlContext (stored in m_contexts), but with highlighting turned off, there is no such context.
As a fix, add a minimalistic KateHlContext to m_contexts in makeNoneContext.
Also fix two typos ("falltrhough", "resolove") in code comments when touching part/syntax/katehighlight.cpp anyway.
Applied patch on KDE/4.13 and KDE/4.14 branch (but not master).
Compiled and ran on KDE/4.13 branch.