Fix EBCDIC problem in conf_def.h

The non-ascii version of this set of macros ensures that the "a" variable
is inside the expected range. This logic wasn't quite right for the
EBCDIC version.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

crypto/conf/conf_def.h

@@ -95,18 +95,18 @@
 
 #else                           /* CHARSET_EBCDIC */
 
-# define IS_COMMENT(c,a)         (KEYTYPES(c)[os_toascii[(int)a]&0xff]&CONF_COMMENT)
-# define IS_FCOMMENT(c,a)        (KEYTYPES(c)[os_toascii[(int)a]&0xff]&CONF_FCOMMENT)
-# define IS_EOF(c,a)             (KEYTYPES(c)[os_toascii[(int)a]&0xff]&CONF_EOF)
-# define IS_ESC(c,a)             (KEYTYPES(c)[os_toascii[(int)a]&0xff]&CONF_ESC)
-# define IS_NUMBER(c,a)          (KEYTYPES(c)[os_toascii[(int)a]&0xff]&CONF_NUMBER)
-# define IS_WS(c,a)              (KEYTYPES(c)[os_toascii[(int)a]&0xff]&CONF_WS)
-# define IS_ALPHA_NUMERIC(c,a)   (KEYTYPES(c)[os_toascii[(int)a]&0xff]&CONF_ALPHA_NUMERIC)
+# define IS_COMMENT(c,a)         (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_COMMENT)
+# define IS_FCOMMENT(c,a)        (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_FCOMMENT)
+# define IS_EOF(c,a)             (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_EOF)
+# define IS_ESC(c,a)             (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_ESC)
+# define IS_NUMBER(c,a)          (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_NUMBER)
+# define IS_WS(c,a)              (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_WS)
+# define IS_ALPHA_NUMERIC(c,a)   (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_ALPHA_NUMERIC)
 # define IS_ALPHA_NUMERIC_PUNCT(c,a) \
-                                (KEYTYPES(c)[os_toascii[(int)a]&0xff]&CONF_ALPHA_NUMERIC_PUNCT)
-# define IS_QUOTE(c,a)           (KEYTYPES(c)[os_toascii[(int)a]&0xff]&CONF_QUOTE)
-# define IS_DQUOTE(c,a)          (KEYTYPES(c)[os_toascii[(int)a]&0xff]&CONF_DQUOTE)
-# define IS_HIGHBIT(c,a)         (KEYTYPES(c)[os_toascii[(int)a]&0xff]&CONF_HIGHBIT)
+                                (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_ALPHA_NUMERIC_PUNCT)
+# define IS_QUOTE(c,a)           (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_QUOTE)
+# define IS_DQUOTE(c,a)          (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_DQUOTE)
+# define IS_HIGHBIT(c,a)         (KEYTYPES(c)[os_toascii[a & 0xff]]&CONF_HIGHBIT)
 #endif                          /* CHARSET_EBCDIC */
 
 static const unsigned short CONF_type_default[256] = {