(FM-2931) fixes logic problem with onlyif type param validation.

Author: bmjen

lib/puppet/type/postgresql_psql.rb

@@ -51,12 +51,9 @@ def matches(value)
 
     # Return true if a matching row is found
     def matches(value)
-      if Puppet::PUPPETVERSION.to_f < 4
-        output, status = provider.run_unless_sql_command(value)
-      else
-        output = provider.run_unless_sql_command(value)
-        status = output.exitcode
-      end
+      output, status = provider.run_unless_sql_command(value)
+      status = output.exitcode if status.nil?
+
       self.fail("Error evaluating 'onlyif' clause, returned #{status}: '#{output}'") unless status == 0
 
       result_count = output.strip.to_i