TTF: return NULL if FT_Set_Pixel_Sizes fails
Fix some dead stores
BAMImporter: plug potential leak in GetFramePixels
Actor: prevent potential invalid memory access
CREImporter: no need to die. just return NULL
assign values to prevent warnings about garbage values
move variables into the scope they are used in.

silence more anylizer warnings
admin: added details on how to generate a gource video
pst: close also the subwindow when loading a game

Signed-off-by: Jaka Kranjc <lynxlupodian@users.sourceforge.net>
only display the spell failure roll if there is a chance to fail
mailmap: fixed avenger's sf email