Make pigz compatible with two-component zlib version numbers.

zlib 1.3 (not 1.3.0) broke the zlib_vernum() function in pigz.
This commit fixes that.

1 files changed, 1 insertions, 1 deletions

diff --git a/pigz.c b/pigz.c
index a9b0f2f..c82c1eb 100644
--- a/pigz.c
+++ b/pigz.c
@@ -1333,7 +1333,7 @@ local long zlib_vernum(void) {
         }
         ver++;
     } while (left);
-    return left < 2 ? num << (left << 2) : -1;
+    return left < 3 ? num << (left << 2) : -1;
 }
 
 // -- check value combination routines for parallel calculation --