Fix maximum minute in PNG tIME chunk

diff --git a/ChangeLog b/ChangeLog
index f62ee6fcd3ada9ab1ea35700149b4e272e37f8c0..b1fb00639029409c98510db05dafc70fe904fc31 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,6 @@
 2017-09-12  7.0.7-3 Glenn Randers-Pehrson <glennrp@image...>
-  * Maximum valid hour is 23, not 24, in the PNG tIME chunk.
+  * Maximum valid hour is 23, not 24, in the PNG tIME chunk,
+    and maximum valid minute is 59, not 60.
 
 2017-09-12  7.0.7-2 Cristy  <quetzlzacatenango@image...>
   * Release ImageMagick version 7.0.7-2, GIT revision 21089:4e46ad9dd:20170912.

diff --git a/coders/png.c b/coders/png.c
index e4c15fbd8cae4457308ad4ae1bdd45d3268da0e8..d41bdfb78e7cf822c44405eb38b535d61c0e7d6c 100644 (file)
--- a/coders/png.c
+++ b/coders/png.c
@@ -8198,7 +8198,7 @@ static void write_tIME_chunk(Image *image,png_struct *ping,png_info *info,
     month++;
     year--;
   }
-  if (minute > 60)
+  if (minute > 59)
   {
      hour++;
      minute-=60;