[PATCH][fortran] PR 63701 Make sure variable is always used initialised

[Kyrill Tkachov <kyrylo dot tkachov at arm dot com>]

Hi all,

As this trivial PR says, found is not initialised, later conditionally 
set to true in the for loop that follows and gcc_asserted in the end.
It is expected that the found = true; statement will always be hit, but 
in case something elsewhere goes wrong and it is not, we want the 
gcc_assert to
use a properly initialised found = false value.

Ok for trunk?

Thanks,
Kyrill

2014-11-11  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

    PR fortran/63701
    * trans-expr.c (gfc_get_tree_for_caf_expr): Initialise found to false.

diff --git a/gcc/fortran/trans-expr.c b/gcc/fortran/trans-expr.c
index 18bc502..b36acbe 100644
--- a/gcc/fortran/trans-expr.c
+++ b/gcc/fortran/trans-expr.c
@@ -1406,7 +1406,7 @@ tree
 gfc_get_tree_for_caf_expr (gfc_expr *expr)
 {
   tree caf_decl;
-  bool found;
+  bool found = false;
   gfc_ref *ref;
 
   gcc_assert (expr && expr->expr_type == EXPR_VARIABLE);