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--- povray-3.6.1/acinclude.m4~	2004-08-03 00:16:14.000000000 +0100
+++ povray-3.6.1/acinclude.m4	2006-11-15 15:29:33.000000000 +0000
@@ -353,13 +353,36 @@
             [
               AC_LANG_SOURCE(
 [#include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include "$5"
 int main (void)
 {
   const char *version = $6;
+  char wanted[[]] = "$2";
+  char *version_tok, *wanted_tok = wanted;
+  char *version_tmp, *wanted_tmp;
   fprintf (stderr, "%s\n", version);
-  return ! (strcmp (version ? version : "", "$2") >= 0);
+  if (!version) return EXIT_FAILURE;
+  version_tok = strdup(version);
+  for (version_tok = strtok_r(version_tok, ".", &version_tmp),
+       wanted_tok  = strtok_r(wanted_tok,  ".", &wanted_tmp);
+       version_tok != NULL && wanted_tok != NULL;
+       version_tok = strtok_r(NULL, ".", &version_tmp),
+       wanted_tok  = strtok_r(NULL, ".", &wanted_tmp)) {
+    char *version_endptr, *wanted_endptr;
+    unsigned long version_bit = strtoul(version_tok, &version_endptr, 10);
+    unsigned long wanted_bit  = strtoul(wanted_tok,  &wanted_endptr,  10);
+    if (version_bit < wanted_bit)
+      return EXIT_FAILURE;
+    if (version_bit > wanted_bit)
+      return EXIT_SUCCESS;
+    if (strcmp(version_endptr, wanted_endptr) > 0)
+      return EXIT_SUCCESS;
+    if (strcmp(version_endptr, wanted_endptr) < 0)
+      return EXIT_FAILURE;
+  }
+  return wanted_tok == NULL ? EXIT_SUCCESS : EXIT_FAILURE;
 }]
               )
             ],
--- povray-3.6.1/source/png_pov.cpp~	2004-08-03 00:11:37.000000000 +0100
+++ povray-3.6.1/source/png_pov.cpp	2006-11-15 16:48:33.000000000 +0000
@@ -782,7 +782,7 @@
       {
          // finished prematurely - trick into thinking done
          png_ptr->num_rows = png_ptr->row_number;
-         png_write_finish_row(png_ptr);
+         png_write_row(png_ptr, row_ptr);
       }
 
 #ifdef POV_COMMENTS // temporarily skip comment writing code