Two minor build fixes

[Behdad Esfahbod]

I need these in my custom build setup.  Looks correct to me.

Thanks
-- 
behdad
http://behdad.org/

diff --git a/src/autofit/aflatin2.c b/src/autofit/aflatin2.c
index c601ab8d9..dab86dde6 100644
--- a/src/autofit/aflatin2.c
+++ b/src/autofit/aflatin2.c
@@ -21,6 +21,7 @@
  */
 
 
+#include <ft2build.h>
 #include FT_ADVANCES_H
 
 
diff --git a/src/gzip/infutil.h b/src/gzip/infutil.h
index 7174b6dd0..cdf18b4f9 100644
--- a/src/gzip/infutil.h
+++ b/src/gzip/infutil.h
@@ -86,7 +86,7 @@ struct inflate_blocks_state {
 
 /* masks for lower bits (size given to avoid silly warnings with Visual C++) */
 #ifndef NO_INFLATE_MASK
-local uInt inflate_mask[17];
+local const uInt inflate_mask[17];
 #endif
 
 /* copy as much as possible from the sliding window to the output area */