tar: fix multiple -t and/or -v options handling.

do not process list of files to tar up in reverse order.

libbb/last_char_is.c

@@ -7,20 +7,19 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-#include <string.h>
 #include "libbb.h"
 
 /* Find out if the last character of a string matches the one given Don't
  * underrun the buffer if the string length is 0.  Also avoids a possible
  * space-hogging inline of strlen() per usage.
  */
-char * last_char_is(const char *s, int c)
+char* last_char_is(const char *s, int c)
 {
-	char *sret = (char *)s;
-	if (sret) {
-		sret = strrchr(sret, c);
-		if(sret != NULL && *(sret+1) != 0)
-			sret = NULL;
+	char *sret;
+	if (s) {
+		sret = strrchr(s, c);
+		if (sret && !sret[1])
+			return sret;
 	}
-	return sret;
+	return NULL;
 }