resolve max block value in cctx and use when calculating the max block size

lib/zstd.h

@@ -501,7 +501,7 @@ typedef enum {
      ZSTD_c_experimentalParam15=1012,
      ZSTD_c_experimentalParam16=1013,
      ZSTD_c_experimentalParam17=1014,
-     ZSTD_c_experimentalParam18=1015,
+     ZSTD_c_experimentalParam18=1015
 } ZSTD_cParameter;
 
 typedef struct {