[autofit] Fix typos.

This also reduces the used heap size by a large factor.

From Behdad.

* src/autofit/afcjk.h (AF_CJKAxisRec): Use `AF_BLUE_STRINGSET_MAX_LEN`.
* src/autofit/aflatin.h (AF_LatinAxisRec): Ditto.

src/autofit/afcjk.h

@@ -84,7 +84,7 @@ FT_BEGIN_HEADER
     /* used for horizontal metrics too for CJK */
     FT_Bool        control_overshoot;
     FT_UInt        blue_count;
-    AF_CJKBlueRec  blues[AF_BLUE_STRINGSET_MAX];
+    AF_CJKBlueRec  blues[AF_BLUE_STRINGSET_MAX_LEN];
 
     FT_Fixed       org_scale;
     FT_Pos         org_delta;

src/autofit/aflatin.h

@@ -98,7 +98,7 @@ FT_BEGIN_HEADER
 
     /* ignored for horizontal metrics */
     FT_UInt          blue_count;
-    AF_LatinBlueRec  blues[AF_BLUE_STRINGSET_MAX];
+    AF_LatinBlueRec  blues[AF_BLUE_STRINGSET_MAX_LEN];
 
     FT_Fixed         org_scale;
     FT_Pos           org_delta;