Merge branch 'PHP-7.0'

* PHP-7.0:
  Restored the original (php-5) behavior of convert_to_cstring(). It was broken in php7 by mistake and caused problems in ext/pgsql/tests/bug46408.phpt.

Zend/zend_operators.c

@@ -492,7 +492,16 @@ ZEND_API void ZEND_FASTCALL convert_to_boolean(zval *op) /* {{{ */
 
 ZEND_API void ZEND_FASTCALL _convert_to_cstring(zval *op ZEND_FILE_LINE_DC) /* {{{ */
 {
-	_convert_to_string(op ZEND_FILE_LINE_CC);
+	double dval;
+	if (Z_TYPE_P(op) == IS_DOUBLE) {
+		zend_string *str;
+		double dval = Z_DVAL_P(op);
+
+		str = zend_strpprintf(0, "%.*H", (int) EG(precision), dval);
+		ZVAL_NEW_STR(op, str);
+	} else {
+		_convert_to_string(op ZEND_FILE_LINE_CC);
+	}
 }
 /* }}} */