merges r20355 from trunk into ruby_1_9_1.

* strftime.c (rb_strftime): should not swallow incomplete
  formatter, e.g. "%E".  [ruby-dev:37170] fix: #787

* strftime.c (rb_strftime): clear flags before processing unknown
  formatter, e.g. "%i".  [ruby-dev:37180]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@20413 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,11 @@
+Tue Nov 25 15:54:07 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* strftime.c (rb_strftime): should not swallow incomplete
+	  formatter, e.g. "%E".  [ruby-dev:37170] fix: #787
+
+	* strftime.c (rb_strftime): clear flags before processing unknown
+	  formatter, e.g. "%i".  [ruby-dev:37180]
+
 Tue Nov 25 10:35:29 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* strftime.c (rb_strftime): "%^P" should convert to upper case.

strftime.c

@@ -310,8 +310,8 @@ rb_strftime(char *s, size_t maxsize, const char *format, const struct tm *timept
 	again:
 		switch (*++format) {
 		case '\0':
-			*s++ = '%';
-			goto out;
+			format--;
+			goto unknown;
 
 		case '%':
 			*s++ = '%';
@@ -762,8 +762,11 @@ rb_strftime(char *s, size_t maxsize, const char *format, const struct tm *timept
 
 		default:
 		unknown:
-			tp = sp;
 			i = format - sp + 1;
+			tp = sp;
+			precision = -1;
+			flags = 0;
+			padding = 0;
 			break;
 		}
 		if (i) {
@@ -786,7 +789,6 @@ rb_strftime(char *s, size_t maxsize, const char *format, const struct tm *timept
 			}
 		}
 	}
-out:
 	if (s >= endp) {
 		goto err;
 	}