Fix NameError for "r" in Msf::Auxiliary::Nmap

Wasn't in scope.

Author: wvu

lib/msf/core/auxiliary/nmap.rb

@@ -184,7 +184,6 @@ def nmap_validate_rports
   if datastore['RPORT'] && (datastore['RPORT'].kind_of?(Fixnum) || !datastore['RPORT'].empty?)
     return true
   end
-  bad_port = false
   if rports.nil? || rports.empty?
     print_error "Missing RPORTS"
     return false
@@ -193,14 +192,10 @@ def nmap_validate_rports
     if r =~ /^([TU]:)?[0-9]*-?[0-9]*$/
       next
     else
-      bad_port = true
-      break
+      print_error "Malformed nmap port: #{r}"
+      return false
     end
   end
-  if bad_port
-    print_error "Malformed nmap port: #{r}"
-    return false
-  end
   print_status "Using RPORTS range #{datastore['RPORTS']}"
   return true
 end