HttpUtils: return raw-data/avoid error-messages when the answer is not HTTP

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@4601 2b470e98-0d58-463d-a4d8-8e2adae1ed80

fhem/FHEM/HttpUtils.pm

@@ -224,6 +224,8 @@ HttpUtils_ParseAnswer($$)
   }
 
   $ret=~ s/(.*?)\r\n\r\n//s; # Not greedy: switch off the header.
+  return ("", $ret) if(!defined($1));
+
   my @header= split("\r\n", $1);
   my @header0= split(" ", shift @header);
   my $code= $header0[1];