--- netpbm-10.20/converter/other/pnmtopng.c.orig	2005-10-19 13:41:17.000000000 +0200
+++ netpbm-10.20/converter/other/pnmtopng.c	2005-10-19 13:42:13.000000000 +0200
@@ -152,7 +152,7 @@ closestColorInPalette(pixel          con
                       unsigned int * const bestMatchP) {
     
     unsigned int paletteIndex;
-    unsigned int bestIndex;
+    unsigned int bestIndex = 0;
     unsigned int bestMatch;
 
     bestMatch = UINT_MAX;
@@ -1359,7 +1359,7 @@ convertpnm(FILE * const ifp, 
       /* The color part of the color/alpha palette passed to the PNG
          compressor 
       */
-  unsigned int palette_size;
+  unsigned int palette_size = MAXCOLORS;
 
   gray trans_pnm[MAXCOLORS];
   png_byte  trans[MAXCOLORS];