fix breakage in compressed file detection

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/libbb/read_printf.c b/libbb/read_printf.c
index 53f528f5a..3aee075c6 100644
--- a/libbb/read_printf.c
+++ b/libbb/read_printf.c
@@ -265,7 +265,7 @@ void FAST_FUNC setup_unzip_on_fd(int fd /*, int fail_if_not_detected*/)
 
         /* .gz and .bz2 both have 2-byte signature, and their
          * unpack_XXX_stream wants this header skipped. */
-        xread(fd, magic.b16, sizeof(magic.b16));
+        xread(fd, magic.b16, sizeof(magic.b16[0]));
         if (ENABLE_FEATURE_SEAMLESS_GZ
          && magic.b16[0] == GZIP_MAGIC
         ) {
@@ -292,7 +292,7 @@ void FAST_FUNC setup_unzip_on_fd(int fd /*, int fail_if_not_detected*/)
                 /* .xz signature: 0xfd, '7', 'z', 'X', 'Z', 0x00 */
                 /* More info at: http://tukaani.org/xz/xz-file-format.txt */
                 offset = -6;
-                xread(fd, magic.b32, sizeof(magic.b32));
+                xread(fd, magic.b32, sizeof(magic.b32[0]));
                 if (magic.b32[0] == XZ_MAGIC2) {
 # if BB_MMU
                         xformer = unpack_xz_stream;