Return all available uncompressed data on error in gzread.c.

The error is recorded, and will be detected by the application
after all of the uncompressed data has been consumed and then one
more call is made to read data. The error is available immediately
from gzerror() if the application would like to know earlier.

1 files changed, 1 insertions, 0 deletions

diff --git a/gzlib.c b/gzlib.c
index 79a7e978..1c5c7be6 100644
--- a/gzlib.c
+++ b/gzlib.c
@@ -104,6 +104,7 @@ local gzFile gz_open(const void *path, int fd, const char *mode) {
         return NULL;
     state->size = 0;            /* no buffers allocated yet */
     state->want = GZBUFSIZE;    /* requested buffer size */
+    state->err = Z_OK;          /* no error yet */
     state->msg = NULL;          /* no error message yet */
 
     /* interpret mode */