test/jsl.conf: ignore functions not always returning a value

what's wrong with this anyway

product/ERP5/tests/jsl.conf

@@ -10,12 +10,12 @@
 # Enable or disable warnings based on requirements.
 # Use "+WarningName" to display or "-WarningName" to suppress.
 #
-+no_return_value              # function {0} does not always return a value
+-no_return_value              # function {0} does not always return a value
 +duplicate_formal             # duplicate formal argument {0}
 +equal_as_assign              # test for equality (==) mistyped as assignment (=)?{0}
 +var_hides_arg                # variable {0} hides argument
 +redeclared_var               # redeclaration of {0} {1}
-+anon_no_return_value         # anonymous function does not always return a value
+-anon_no_return_value         # anonymous function does not always return a value
 +missing_semicolon            # missing semicolon
 +meaningless_block            # meaningless block; curly braces have no impact
 +comma_separated_stmts        # multiple statements separated by commas (use semicolons?)