libtiff: tiffmedian: fix memory leaks

SDL Commits
1 
From 04118f8a42a1d6c5d0c0d50d9e0404927ada4417 Mon Sep 17 00:00:00 2001
From: Lee Howard <[EMAIL REDACTED]>
Date: Fri, 17 May 2024 12:52:30 +0000
Subject: [PATCH] tiffmedian: fix memory leaks

Closes #599
---
 tools/tiffmedian.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/tiffmedian.c b/tools/tiffmedian.c
index 334566a4..02b0bc2b 100644
--- a/tools/tiffmedian.c
+++ b/tools/tiffmedian.c
@@ -270,7 +270,10 @@ int main(int argc, char *argv[])
      */
     out = TIFFOpen(argv[optind + 1], "w");
     if (out == NULL)
+    {
+        _TIFFfree(ColorCells);
         return (EXIT_FAILURE);
+    }
 
     CopyField(TIFFTAG_SUBFILETYPE, longv);
     CopyField(TIFFTAG_IMAGEWIDTH, longv);
@@ -320,6 +323,7 @@ int main(int argc, char *argv[])
     }
     TIFFSetField(out, TIFFTAG_COLORMAP, rm, gm, bm);
     (void)TIFFClose(out);
+    _TIFFfree(ColorCells);
     return (EXIT_SUCCESS);
 }
 
@@ -785,7 +789,7 @@ static C_cell *create_colorcell(int red, int green, int blue)
 static void map_colortable(void)
 {
     register uint32_t *histp = &histogram[0][0][0];
-    register C_cell *cell;
+    register C_cell *cell = NULL;
     register int j, tmp, d2, dist;
     int ir, ig, ib, i;
 
@@ -824,6 +828,7 @@ static void map_colortable(void)
                     }
                 }
             }
+    _TIFFfree(cell);
 }
 
 /*