config: correct core.loosecompression documentation

* core.loosecompression stated that the default was "0 (best speed)",
  when in fact 0 is "no compression", and the default is Z_BEST_SPEED,
  which is 1.
Signed-off-by: NBrian Downing <bdowning@lavos.net>
Acked-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Documentation/config.txt

@@ -232,7 +232,7 @@ core.loosecompression::
 	are not in a pack file. -1 is the zlib default. 0 means no
 	compression, and 1..9 are various speed/size tradeoffs, 9 being
 	slowest.  If not set,  defaults to core.compression.  If that is
-	not set,  defaults to 0 (best speed).
+	not set,  defaults to 1 (best speed).
 
 core.packedGitWindowSize::
 	Number of bytes of a pack file to map into memory in a