Revert "Merge branch 'sse2_strtolower' of https://github.com/laruence/php-src"

This reverts commit 5a6373f, reversing
changes made to 45cb421.

This breaks strtolower-win32.phpt.

Author: nikic

ext/standard/string.c

@@ -1462,33 +1462,29 @@ PHPAPI zend_string *php_string_tolower(zend_string *s)
 	unsigned char *c;
 	const unsigned char *e;
 
-	if (EXPECTED(!BG(locale_changed))) {
-		return zend_string_tolower(s);
-	} else {
-		c = (unsigned char *)ZSTR_VAL(s);
-		e = c + ZSTR_LEN(s);
+	c = (unsigned char *)ZSTR_VAL(s);
+	e = c + ZSTR_LEN(s);
 
-		while (c < e) {
-			if (isupper(*c)) {
-				register unsigned char *r;
-				zend_string *res = zend_string_alloc(ZSTR_LEN(s), 0);
+	while (c < e) {
+		if (isupper(*c)) {
+			register unsigned char *r;
+			zend_string *res = zend_string_alloc(ZSTR_LEN(s), 0);
 
-				if (c != (unsigned char*)ZSTR_VAL(s)) {
-					memcpy(ZSTR_VAL(res), ZSTR_VAL(s), c - (unsigned char*)ZSTR_VAL(s));
-				}
-				r = c + (ZSTR_VAL(res) - ZSTR_VAL(s));
-				while (c < e) {
-					*r = tolower(*c);
-					r++;
-					c++;
-				}
-				*r = '\0';
-				return res;
+			if (c != (unsigned char*)ZSTR_VAL(s)) {
+				memcpy(ZSTR_VAL(res), ZSTR_VAL(s), c - (unsigned char*)ZSTR_VAL(s));
 			}
-			c++;
+			r = c + (ZSTR_VAL(res) - ZSTR_VAL(s));
+			while (c < e) {
+				*r = tolower(*c);
+				r++;
+				c++;
+			}
+			*r = '\0';
+			return res;
 		}
-		return zend_string_copy(s);
+		c++;
 	}
+	return zend_string_copy(s);
 }
 /* }}} */