--- netpbm-10.27/converter/other/bmptopnm.c.bmptopnm	2005-05-09 10:06:05.707795976 +0200
+++ netpbm-10.27/converter/other/bmptopnm.c	2005-05-09 10:29:30.498235368 +0200
@@ -932,7 +932,7 @@ readBmp(FILE *               const ifP, 
         xel **               const colormapP,
         bool                 const verbose) {
 
-    xel * colormap;  /* malloc'ed */
+    xel * colormap = NULL;  /* malloc'ed */
     unsigned int pos;
 
     /* The following are all information from the BMP headers */
@@ -1106,7 +1106,7 @@ main(int argc, char ** argv) {
     writeRaster(BMPraster, cols, rows, outputType, cBitCount, pixelformat,
                 colormap);
 
-    free(colormap);
+    if (colormap) free(colormap);
     free(BMPraster);
 
     exit(0);