Fix clang warnings.

sys/boot/ficl/fileaccess.c

@@ -420,6 +420,6 @@ void ficlCompileFile(FICL_SYSTEM *pSys)
     ficlSetEnv(pSys, "file-ext", FICL_TRUE);
 #endif /* FICL_HAVE_FTRUNCATE */
 #else
-    &pSys;
+    (void)pSys;
 #endif /* FICL_WANT_FILE */
 }

sys/boot/ficl/i386/sysdep.h

@@ -58,7 +58,7 @@
 #include <assert.h>
 
 #if !defined IGNORE		/* Macro to silence unused param warnings */
-#define IGNORE(x) &x
+#define IGNORE(x) (void)x
 #endif
 
 /*
@@ -405,7 +405,7 @@ void *ficlRealloc(void *p, size_t size);
 #if FICL_MULTITHREAD
 int ficlLockDictionary(short fLock);
 #else
-#define ficlLockDictionary(x) 0 /* ignore */
+#define ficlLockDictionary(x) /* ignore */
 #endif
 
 /*