[newlib-cygwin] ctype: align size of category bit fields to small targets needs

[Corinna Vinschen <corinna@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=134f93f313db95c394b925716717031a05b2a6d3

commit 134f93f313db95c394b925716717031a05b2a6d3
Author: Corinna Vinschen <corinna@vinschen.de>
Date:   Wed Mar 14 10:36:34 2018 +0100

    ctype: align size of category bit fields to small targets needs
    
    E.g. arm ABI requires -fshort-enums for bare-metal toolchains.
    Given there are only 29 category enums, the compiler chooses an
    8 bit enum type, so a size of 11 bits for the bitfield leads to
    a compile time error:
    
      error: width of 'cat' exceeds its type
        enum category cat: 11;
                      ^~~
    
    Fix this by aligning the size of the category members to byte
    borders.
    
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 newlib/libc/ctype/categories.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/newlib/libc/ctype/categories.c b/newlib/libc/ctype/categories.c
index db285d7..c237324 100644
--- a/newlib/libc/ctype/categories.c
+++ b/newlib/libc/ctype/categories.c
@@ -2,8 +2,8 @@
 #include "categories.h"
 
 struct _category {
-  enum category cat: 11;
-  unsigned int first: 21;
+  enum category cat: 8;
+  unsigned int first: 24;
   unsigned short delta;
 } __attribute__((packed));