Updates mapdata.cpp for stone walls.
Tiles.
mapdata.h
Missing initializer.
Grammatical fixes to tools

I went in to fix one thing and... I didn't go through the complete file yet, not enough time.
More grammatical fixes to tools #6339
Removed syntax-breaking comma
Reinstated double spaces
Forgot two
Merge pull request #6341 from pimms/master

More grammatical fixes to tools #6339
Merge pull request #6339 from nieenden/patch-3

Grammatical fixes to tools
change flare gun accesory number

from 42 accessory slots to 4
Merge pull request #6394 from noppa354/flaregun-accessory-fi

change flare gun accesory number
Merge branch 'updates-mapadata-cpp-for-stone-walls' of https://github.com/Rivet-the-Zombie/Cataclysm-DDA into Rivet-the-Zombie-updates-mapadata-cpp-for-stone-walls
Merge branch 'master' of https://github.com/CleverRaven/Cataclysm-DDA