[Snowball-discuss] Patches for stem_english.c

[Olly Betts]

Hi Snowballers,

I've attached 4 patches for stem_english.c - these are:

snowball-01-singly.patch

Bug-fix - currently "singly" stems to "singl\0" (I suspect most callers use
the length to nul-terminate, so the extra nul goes unnoticed.

snowball-02-missing-return.patch

There's a missing return on one case in a switch.  This means we'll fall
through into the next case, but that will never match so this bug just
causes a small performance penalty for words which go through the case
with the missing return.

snowball-03-use-isalpha.patch

In the C locale (which the test code runs in since it doesn't call
setlocale()), isupper(ch) || islower(ch) is equivalent to isalpha(ch).

snowball-04-ctype.patch

The algorithm part of the code uses tolower() but doesn't include
<ctype.h> to get it declared.

Cheers,
    Olly
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