pgsql: ecpg: Split off mmfatal() from mmerror()

ecpg: Split off mmfatal() from mmerror()

This allows decorating mmfatal() with noreturn compiler hints, leading
to better diagnostics.

Branch
------
master

Details
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http://git.postgresql.org/pg/commitdiff/b21de4e7b32f868a23bdc5507898d36cbe146164

Modified Files
--------------
src/interfaces/ecpg/preproc/descriptor.c |    4 +--
src/interfaces/ecpg/preproc/ecpg.header  |   47 ++++++++++++++++++++----------
src/interfaces/ecpg/preproc/ecpg.trailer |    2 +-
src/interfaces/ecpg/preproc/extern.h     |    6 ++--
src/interfaces/ecpg/preproc/nls.mk       |    4 +--
src/interfaces/ecpg/preproc/pgc.l        |   42 +++++++++++++-------------
src/interfaces/ecpg/preproc/type.c       |   14 ++++-----
src/interfaces/ecpg/preproc/type.h       |    2 +-
src/interfaces/ecpg/preproc/variable.c   |   36 +++++++++++------------
9 files changed, 85 insertions(+), 72 deletions(-)