shell/math: fix ?: to not evaluate not-taken branches

This fixes ash-arith-arith-ternary1/2.tests

function                                             old     new   delta
evaluate_string                                     1271    1432    +161
arith_apply                                          968    1000     +32
arith                                                 22      36     +14
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 207/0)             Total: 207 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/shell/math.h b/shell/math.h
index 41ef6e8df..452ddaddd 100644
--- a/shell/math.h
+++ b/shell/math.h
@@ -73,13 +73,12 @@ typedef long arith_t;
 
 typedef const char* FAST_FUNC (*arith_var_lookup_t)(const char *name);
 typedef void        FAST_FUNC (*arith_var_set_t)(const char *name, const char *val);
-//typedef const char* FAST_FUNC (*arith_var_endofname_t)(const char *name);
 
 typedef struct arith_state_t {
         const char           *errmsg;
         arith_var_lookup_t    lookupvar;
         arith_var_set_t       setvar;
-//      arith_var_endofname_t endofname;
+        uint64_t              evaluation_disabled;
         void                 *list_of_recursed_names;
 } arith_state_t;