Fixed compiler warnings regarding type of argument passed

src/frontend/breakp.c

@@ -95,7 +95,7 @@ com_stop(wordlist *wl)
                 charr[1] = copy("eq");
                 charr[2] = tokafter;
                 charr[3] = NULL;
-                wln = wl_build(charr);
+                wln = wl_build((const char * const *) charr);
                 wl_splice(wl->wl_next, wln);
             }
             /* continue with parsing the enhanced wordlist */

src/frontend/device.c

@@ -1469,7 +1469,7 @@ com_alter_mod(wordlist *wl)
             }
             arglist[2] = inptoken;
             /* create a new wordlist from array arglist */
-            newcommand = wl_build(arglist);
+            newcommand = wl_build((const char * const *) arglist);
             com_alter_common(newcommand->wl_next, 1);
             wl_free(newcommand);
             tfree(inptoken);

src/frontend/postcoms.c

@@ -579,7 +579,7 @@ com_write_sparam(wordlist *wl)
     sbuf[3] = "S12";
     sbuf[4] = "S22";
     sbuf[5] = NULL;
-    wl_sparam = wl_build(sbuf);
+    wl_sparam = wl_build((const char * const *) sbuf);
 
     names = ft_getpnames(wl_sparam, TRUE);
     if (names == NULL)