Don't use included strlcpy/strlcat when already defined as macros

OS X 10.9 with Fortify has conflicting prototypes:

In file included from calmwm.c:36:
./calmwm.h:28:8: error: conflicting types for '__builtin___strlcat_chk' /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/secure/_string.h:111:3:
note:
      expanded from macro 'strlcat'
  __builtin___strlcat_chk (dest, src, len, __darwin_obsz (dest))

calmwm.h

@@ -21,11 +21,24 @@
 #ifndef _CALMWM_H_
 #define _CALMWM_H_
 
+#include <sys/param.h>
+#include <stdio.h>
+#include "queue.h"
+
 /* prototypes for portable-included functions */
 char *fgetln(FILE *, size_t *);
 long long strtonum(const char *, long long, long long, const char **);
-size_t strlcpy(char *, const char *, size_t);
+
+#ifdef strlcat
+#define HAVE_STRLCAT
+#else
 size_t strlcat(char *, const char *, size_t);
+#endif
+#ifdef strlcpy
+#define HAVE_STRLCPY
+#else
+size_t strlcpy(char *, const char *, size_t);
+#endif
 
 #include <X11/XKBlib.h>
 #include <X11/Xatom.h>

strlcat.c

@@ -18,10 +18,11 @@
 
 /* OPENBSD ORIGINAL: lib/libc/string/strlcat.c */
 
-#ifndef HAVE_STRLCAT
-
 #include <sys/types.h>
 #include <string.h>
+#include "calmwm.h"
+
+#ifndef HAVE_STRLCAT
 
 /*
  * Appends src to string dst of size siz (unlike strncat, siz is the

strlcpy.c

@@ -18,10 +18,11 @@
 
 /* OPENBSD ORIGINAL: lib/libc/string/strlcpy.c */
 
-#ifndef HAVE_STRLCPY
-
 #include <sys/types.h>
 #include <string.h>
+#include "calmwm.h"
+
+#ifndef HAVE_STRLCPY
 
 /*
  * Copy src to string dst of size siz.  At most siz-1 characters