fixed a bug with graph debug and graphs not showing

 Call to undefined function rrd_substitute_device_query_data() in //lib/rrd.php on line 1951, referer: http://cacti/graphs.php?action=graph_edit&id=19

lib/rrd.php

@@ -1823,7 +1823,7 @@ function rrdtool_function_graph($local_graph_id, $rra_id, $graph_data_array, $rr
 			case GRAPH_ITEM_TYPE_COMMENT:
 				if (!isset($graph_data_array['graph_nolegend'])) {
 					# perform variable substitution first (in case this will yield an empty results or brings command injection problems)
-					$comment_arg = rrd_substitute_device_query_data($graph_variables['text_format'][$graph_item_id], $graph, $graph_item);
+					$comment_arg = rrd_substitute_host_query_data($graph_variables['text_format'][$graph_item_id], $graph, $graph_item);
 					# next, compute the argument of the COMMENT statement and perform injection counter measures
 					if (trim($comment_arg) == '') { # an empty COMMENT must be treated with care
 						$comment_arg = cacti_escapeshellarg(' ' . $hardreturn[$graph_item_id]);
@@ -1948,7 +1948,7 @@ function rrdtool_function_graph($local_graph_id, $rra_id, $graph_data_array, $rr
 				$graph_variables['value'][$graph_item_id] = str_replace(':', '\:', $graph_variables['value'][$graph_item_id]); /* escape colons */
 
 				/* perform variable substitution; if this does not return a number, rrdtool will FAIL! */
-				$substitute = rrd_substitute_device_query_data($graph_variables['value'][$graph_item_id], $graph, $graph_item);
+				$substitute = rrd_substitute_host_query_data($graph_variables['value'][$graph_item_id], $graph, $graph_item);
 
 				if (is_numeric($substitute)) {
 					$graph_variables['value'][$graph_item_id] = $substitute;