make: use the more modern wchar routines, not widec.h

@@ -177,11 +177,11 @@
                 (void) sprintf(nice_prio_buf, "-%d", nice_prio);
                 argv[argv_index++] = strdup(nice_prio_buf);
         }
         argv[argv_index++] = shellname;
         argv[argv_index++] = (char*)(ignore_error ? "-c" : "-ce");
-        if ((length = wslen(command)) >= MAXPATHLEN) {
+        if ((length = wcslen(command)) >= MAXPATHLEN) {
                 tmp_mbs_buffer = getmem((length * MB_LEN_MAX) + 1);
                 (void) wcstombs(tmp_mbs_buffer, command, (length * MB_LEN_MAX) + 1);
                 cmd_argv_index = argv_index;
                 argv[argv_index++] = strdup(tmp_mbs_buffer);
                 retmem_mb(tmp_mbs_buffer);

@@ -340,11 +340,11 @@
          * Reserve argv[0] for sh in case of exec_vp failure.
          * Don't worry about prepending /usr/bin/nice command to argv[0].
          * In fact, doing it may cause the sh command to fail!
          */
         p = &argv[1];
-        if ((length = wslen(command)) >= MAXPATHLEN) {
+        if ((length = wcslen(command)) >= MAXPATHLEN) {
                 tmp_mbs_buffer = getmem((length * MB_LEN_MAX) + 1);
                 (void) wcstombs(tmp_mbs_buffer, command, (length * MB_LEN_MAX) + 1);
                 argv[0] = strdup(tmp_mbs_buffer);
                 retmem_mb(tmp_mbs_buffer);
         } else {

@@ -371,11 +371,11 @@
                         t++;
                 }
                 if (*t) {
                         for (*t++ = (int) nul_char; iswspace(*t); t++);
                 }
-                if ((length = wslen(q)) >= MAXPATHLEN) {
+                if ((length = wcslen(q)) >= MAXPATHLEN) {
                         tmp_mbs_buffer = getmem((length * MB_LEN_MAX) + 1);
                         (void) wcstombs(tmp_mbs_buffer, q, (length * MB_LEN_MAX) + 1);
                         *p++ = strdup(tmp_mbs_buffer);
                         retmem_mb(tmp_mbs_buffer);
                 } else {