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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<tr><td><span title='2019-12-23 18:14:17 +0100'>2019-12-23</span></td><td><a href='/guix/commit/gnu/packages/patches/grantlee-merge-theme-dirs.patch?id=b2fdd0cf4ade20b3d9bf0b249b32e06e9f8bf1b0'>gnu: Add grantleetheme.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/kde.scm (grantleetheme): New variable.
* gnu/packages/patches/grantlee-merge-theme-dirs.patch: New file.
* gnu:lokal.mk (DATA): Add it.
</span></span></td><td>Hartmut Goebel</td></tr>