Merge branch 'avalanche' of https://github.com/urukgit/scummvm into avalanche

Conflicts:
	engines/avalanche/dropdown2.cpp
	engines/avalanche/dropdown2.h
AVALANCHE: Repair regression in Acci::inventory().
AVALANCHE: Fix even more GCC warnings
AVALANCHE: Fix some more GCC warnings
AVALANCHE: Fix very verbose source of warning
AVALANCHE: Do renaming/refactoring in Acci, Avalanche and Dropdown. Unify drawing of menus' text in Dropdown in a single function: drawMenuText().
AVALANCHE: Get rid of Enhanced. Further renamings and refactoring in Avalanche and Avalot.
AVALANCHE: Fix some more GCC warnings
AVALANCHE: Fix GCC warnings
AVALANCHE: Fix uninitialized variable
AVALANCHE: Fix systematic typo in comments
AVALANCHE: Remove dead code reported by CppCheck
AVALANCHE: Fix more warnings reported by CppCheck
AVALANCHE: Start replacing C-style comments by C++-style
AVALANCHE: Finish replacing C-style comments by C++-style
AVALANCHE: Add some brackets to improve readability
AVALANCHE: Fix warnings reported by GCC
AVALANCHE: Fix one more GCC warning
AVALANCHE: Fix GCC warning.
AVALANCHE: Fix some memory leak problems.