fix type conversion error (on windows) unsigned/signed affecting timestamps on rrd_dump.

[rrdtool.git] / src / rrd_first.c

diff --git a/src/rrd_first.c b/src/rrd_first.c
index 82b99f3..4da1b3a 100644 (file)
--- a/src/rrd_first.c
+++ b/src/rrd_first.c
@@ -6,6 +6,7 @@
  * Initial version by Burton Strauss, ntopSupport.com - 3/2005
  *****************************************************************************/
 
+#include <stdlib.h>
 #include "rrd_tool.h"
 
 
@@ -81,7 +82,7 @@ time_t rrd_first_r(
              (rra_start +
               (rrd.rra_ptr[rraindex].cur_row + 1) *
               rrd.stat_head->ds_cnt * sizeof(rrd_value_t)), SEEK_SET);
-    timer = -(rrd.rra_def[rraindex].row_cnt - 1);
+    timer = -(long)(rrd.rra_def[rraindex].row_cnt - 1);
     if (rrd.rra_ptr[rraindex].cur_row + 1 > rrd.rra_def[rraindex].row_cnt) {
         rrd_seek(rrd_file, rra_start, SEEK_SET);
     }