typo

Author: MichaelChirico

src/fwrite.c

@@ -566,7 +566,7 @@ int init_stream(z_stream *stream) {
   stream->opaque = Z_NULL;
   // In deflateInit2, windowBits can be –8..–15 for raw deflate, 15 is the bigger window size.
   // With -15, deflate() will generate raw deflate data with no zlib header or trailer, and will not compute a check value.
-  // Previously this parameter was 31 baecause windowBits can be greater than 15 for optional gzip encoding.
+  // Previously this parameter was 31 because windowBits can be greater than 15 for optional gzip encoding.
   // Adding 16 writes a simple gzip header and trailer around the compressed data.
   // Now we manage header and trailer. gzip file is slighty lower with -15 because no header/trailer are
   // written for each chunk.