Fix collector out of array access.

Alexander Korotkov · Alexander Korotkov · commit a6f2eee5cb69 · 2016-09-30T17:27:05.000+03:00
diff --git a/collector.c b/collector.c
@@ -122,13 +122,13 @@ get_next_observation(History *observations)
 {
 	HistoryItem *result;
 
-	result = &observations->items[observations->index];
-	observations->index++;
 	if (observations->index >= observations->count)
 	{
 		observations->index = 0;
 		observations->wraparound = true;
 	}
+	result = &observations->items[observations->index];
+	observations->index++;
 	return result;
 }
 

Original file line number	Diff line number	Diff line change
`@@ -122,13 +122,13 @@ get_next_observation(History *observations)`
`122`	`122`	`{`
`123`	`123`	`HistoryItem *result;`
`124`	`124`
`125`		`- result = &observations->items[observations->index];`
`126`		`- observations->index++;`
`127`	`125`	`if (observations->index >= observations->count)`
`128`	`126`	`{`
`129`	`127`	`observations->index = 0;`
`130`	`128`	`observations->wraparound = true;`
`131`	`129`	`}`
	`130`	`+ result = &observations->items[observations->index];`
	`131`	`+ observations->index++;`
`132`	`132`	`return result;`
`133`	`133`	`}`
`134`	`134`