Add forward declarations.

--- fastcap/src/mulSetup.c.orig	2015-07-22 13:55:21.592119775 +0200
+++ fastcap/src/mulSetup.c	2015-07-22 14:08:50.157688209 +0200
@@ -35,6 +35,14 @@
 
 #include "mulGlobal.h"
 
+static getnbrs(ssystem*);
+static linkcubes(ssystem*);
+static setMaxq(ssystem*);
+static getAllInter(ssystem*);
+static set_vector_masks(ssystem*);
+static indexkid(ssystem*, cube*, int*, int*);
+static int placeq(int, ssystem*, charge*);
+
 cube *cstack[1024];		/* Stack used in several routines. */
 
 /*
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<div class='path'>path: <a href='/guix/log/?id=2dfacc1d33b82c8c30396725aaa350bfd12497cc'>root</a>/<a href='/guix/log/tests?id=2dfacc1d33b82c8c30396725aaa350bfd12497cc'>tests</a>/<a href='/guix/log/tests/guix-hash.sh?id=2dfacc1d33b82c8c30396725aaa350bfd12497cc'>guix-hash.sh</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/guix-hash.sh?id=2dfacc1d33b82c8c30396725aaa350bfd12497cc&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-09-28 21:06:36 -0500'>2020-09-28</span></td><td><a href='/guix/commit/tests/guix-hash.sh?id=d8934360d2453a403b5433e71d09188e4ed23b57'>tests: Simplify shell exit status negation;</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/guix-archive.sh, tests/guix-build-branch.sh, tests/guix-build.sh,
tests/guix-daemon.sh, tests/guix-download.sh, tests/guix-environment.sh,
tests/guix-gc.sh, tests/guix-git-authenticate.sh, tests/guix-graph.sh,
tests/guix-hash.sh, tests/guix-lint.sh, tests/guix-pack-relocatable.sh,
tests/guix-pack.sh, tests/guix-package-aliases.sh, tests/guix-package-net.sh,
tests/guix-package.sh: Use the shell '!' keyword to negate command exit status
in place of 'if ...; then false; else true; fi'
</span></span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2020-05-22 00:35:24 +0200'>2020-05-22</span></td><td><a href='/guix/commit/tests/guix-hash.sh?id=0e4e9c8e7655f3e2a9c2615923768d211ac02a3e'>guix hash, guix download: Support base64 format.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/download.scm (show-help, %options): Support "base64"
format.
* guix/scripts/hash.scm (show-help, %options): Likewise.
* tests/guix-hash.sh: Test it.
* doc/guix.texi (Invoking guix hash): Document it.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-05-22 00:35:24 +0200'>2020-05-22</span></td><td><a href='/guix/commit/tests/guix-hash.sh?id=18ae1ec3ecfe22d55d6cdf595a442afebbc5595a'>guix hash, guix download: Add '--hash'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/download.scm (%default-options): Add 'hash-algorithm'.
(show-help, %options): Add "--hash".
(guix-download): Honor it.
* guix/scripts/hash.scm (%default-options): Add 'hash-algorithm'.
(show-help, %options): Add "--hash".
(guix-hash): Honor it.
* tests/guix-hash.sh: Test '-H sha512'.
* doc/guix.texi (Invoking guix download): Document it.
(Invoking guix hash): Document it.
</span></span></td><td>Ludovic Courtès</td></tr>