Elimate compiler warnings

[ctsim.git] / libctsim / imagefile.cpp

diff --git a/libctsim/imagefile.cpp b/libctsim/imagefile.cpp
index eeda46d37d4300f4662d15ac2924fa88ebdaa311..8710e5a002eae10c85804ec1aee911b7c8e66d22 100644 (file)
--- a/libctsim/imagefile.cpp
+++ b/libctsim/imagefile.cpp
@@ -1545,8 +1545,8 @@ ImageFile::readImagePNG (const char* const pszFile)
   if (!fp)
     return false;
   unsigned char header[8];
-  fread (header, 1, 8, fp);
-  if (png_sig_cmp (header, 0, 8)) {
+  int n = fread (header, 1, 8, fp);
+  if (n != 8 || png_sig_cmp (header, 0, 8)) {
     fclose (fp);
     return false;
   }