src/base/ftmac.c, src/base/ftrfork.c, src/lzw/ftzopen.c,
src/raster/ftrend1.c, src/sfnt/ttpost.c, src/truetype/ttgxvar.c,
src/type42/t42parse.c, src/winfonts/winfnt.c: hardening the code
against out-of-bounds conditions when allocating arrays. This is
for the cases where FT_NEW_ARRAY and FT_RENEW_ARRAY are not used
already. Introducing the new FT_ALLOC_MULT and FT_REALLOC_MULT
macros.
* src/lzw/ftlzw2.c, src/lzw/ftzopen.h, src/lzw/ftzopen.c, src/lzw/rules.mk:
first version of LZW loader re-implementation. Apparently, saves about
260 KB of heap memory when loading tir24.pcf.Z
Blaskey).
* src/sfnt/ttcmap.h (TT_CMap): Add member `unsorted'.
* src/sfnt/ttcmac.c: Use SFNT_Err_Ok where appropriate.
(tt_cmap0_validate, tt_cmap2_validate, tt_cmap6_validate,
tt_cmap8_validate, tt_cmap10_validate, tt_cmap12_validate): Use
`FT_Error' as return type.
(tt_cmap4_validate): Use `FT_Error' as return type.
Return error code for unsorted cmap.
(tt_cmap4_char_index, tt_cmap4_char_next): Use old code for unsorted
cmaps.
(tt_face_build_cmaps): Set `unsorted' variable in cmap.
Minor formatting.
used to reduce the amount of heap size required to only test wether
we're dealing with a BDF font (the old code allocated 64 Kb right
before any test).
* src/lzw/ftlzw.c (FT_Stream_OpenLZW): modified the function to check
the LZW header before doing anything else. This helps avoid un-necessary
heap allocations (400 Kb of heap memory for the LZW decoder ! Oh my !)
* src/gzip/ftgzip.c (FT_Stream_OpenGZip): ditto for the .gz decoder,
though the code savings is smaller.
