Fix unsigned conversion bug.

Since readi() returns -1 for errors, checking with < against an unsigned
value is inadvisable. Checking with != works as intended however.

diff --git a/exec.c b/exec.c
index 6be6af1bc42d7cb67e2d7866a08429f666ef4e39..4d7d97cc8faca8b7288d64e9e15f9708e0d00929 100644 (file)
--- a/exec.c
+++ b/exec.c
@@ -28,7 +28,7 @@ exec(char *path, char **argv)
   pgdir = 0;
 
   // Check ELF header
-  if(readi(ip, (char*)&elf, 0, sizeof(elf)) < sizeof(elf))
+  if(readi(ip, (char*)&elf, 0, sizeof(elf)) != sizeof(elf))
     goto bad;
   if(elf.magic != ELF_MAGIC)
     goto bad;