bugfixes for saving of charts

git-svn-id: https://fhem.svn.sourceforge.net/svnroot/fhem/trunk/fhem@2867 2b470e98-0d58-463d-a4d8-8e2adae1ed80

www/frontend/FHEM/93_DbLog.pm

@@ -810,7 +810,6 @@ sub chartQuery($@) {
     if ($sql eq "error") {
        return jsonError("Could not setup SQL String");
     }
-
     my ($hash, @a) = @_;
     my $dbhf= $hash->{DBHF};
 
@@ -863,8 +862,8 @@ sub chartQuery($@) {
             $jsonstring .= '":';
 
             if (defined $data[$i]) {
-                my $fragment =  substr($data[$i],0,2);
-                if ($fragment eq "[{") {
+                my $fragment =  substr($data[$i],0,1);
+                if ($fragment eq "{") {
                     $jsonstring .= $data[$i];
                 } else {
                     $jsonstring .= '"'.$data[$i].'"';
@@ -1328,4 +1327,4 @@ sub chartQuery($@) {
 </ul>
 
 =end html_DE
-=cut
+=cut