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=a9003b8e6b40b59c9545ae87bb441d3549630db7'>root</a>/<a href='/guix/log/build-aux?id=a9003b8e6b40b59c9545ae87bb441d3549630db7'>build-aux</a>/<a href='/guix/log/build-aux/update-NEWS.scm?id=a9003b8e6b40b59c9545ae87bb441d3549630db7'>update-NEWS.scm</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/build-aux/update-NEWS.scm?id=a9003b8e6b40b59c9545ae87bb441d3549630db7&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-05-10 13:48:02 -0400'>2021-05-10</span></td><td><a href='/guix/commit/build-aux/update-NEWS.scm?id=ed2d4d52dde00bdccc1bb2c93b24ffcc72a7fcd3'>maint: update-NEWS: Sort packages prior writing to the data file.</a><span class='msg-avail'>...<span class='msg-tooltip'>* build-aux/update-NEWS.scm (main): Sort packages.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-04-23 21:32:46 -0400'>2021-04-23</span></td><td><a href='/guix/commit/build-aux/update-NEWS.scm?id=18dc8c6f0f76b8d128638105eebad2895f9857f0'>build-aux: Relax the regexp used to match NEWS sections.</a><span class='msg-avail'>...<span class='msg-tooltip'>A number of packages doesn't really make sense in the name of the section to
be substituted.  This change allows using simply '*** new packages' instead of
'*** 1999 new packages', for example, and have the update-NEWS.scm script
update it.

* build-aux/update-NEWS.scm (write-packages-added) &lt;regexp&gt;: Do not care about
leading white space in the name of the section.
</span></span></td><td>Maxim Cournoyer</td></tr>