Test case added for bug #9527 (negative zero is a nonsence)

mysql-test/r/type_newdecimal.result:
  test result fixed
mysql-test/t/type_newdecimal.test:
  test case added

mysql-test/r/type_newdecimal.result

@@ -860,3 +860,6 @@ Error	1292	Truncated incorrect DECIMAL value: ''
 select 0.190287977636363637 + 0.040372670 * 0 -  0;
 0.190287977636363637 + 0.040372670 * 0 -  0
 0.190287977636363637
+select -0.123 * 0;
+-0.123 * 0
+0.000

mysql-test/t/type_newdecimal.test

@@ -888,3 +888,7 @@ select 9999999999999999999999999999999999999999999999999999999999999999999999999
 # Bug #10004
 #
 select 0.190287977636363637 + 0.040372670 * 0 -  0;
+#
+# Bug #9527
+#
+select -0.123 * 0;