[RFA v2 07/13] Call value_fetch_lazy when needed in pretty-printers

[Tom Tromey <tom@tromey.com>]

This removes some unused variables, and replaces the calls to
value_contents_for_printing with a call to value_fetch_lazy, when
needed.

gdb/ChangeLog
2018-07-21  Tom Tromey  <tom@tromey.com>

	* python/py-prettyprint.c (gdbpy_apply_val_pretty_printer): Remove
	unused variable.  Call value_fetch_lazy when needed.
	* guile/scm-pretty-print.c (gdbscm_apply_val_pretty_printer):
	Remove unused variable.  Call value_fetch_lazy when needed.
---
 gdb/ChangeLog                | 7 +++++++
 gdb/guile/scm-pretty-print.c | 4 +++-
 gdb/python/py-prettyprint.c  | 4 +++-
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/gdb/guile/scm-pretty-print.c b/gdb/guile/scm-pretty-print.c
index 3fe36820a6a..f292960dbbd 100644
--- a/gdb/guile/scm-pretty-print.c
+++ b/gdb/guile/scm-pretty-print.c
@@ -949,7 +949,9 @@ gdbscm_apply_val_pretty_printer (const struct extension_language_defn *extlang,
   enum display_hint hint;
   enum ext_lang_rc result = EXT_LANG_RC_NOP;
   enum string_repr_result print_result;
-  const gdb_byte *valaddr = value_contents_for_printing (val);
+
+  if (value_lazy (val))
+    value_fetch_lazy (val);
 
   /* No pretty-printer support for unavailable values.  */
   if (!value_bytes_available (val, embedded_offset, TYPE_LENGTH (type)))
diff --git a/gdb/python/py-prettyprint.c b/gdb/python/py-prettyprint.c
index 21b1ce94879..a8a84899309 100644
--- a/gdb/python/py-prettyprint.c
+++ b/gdb/python/py-prettyprint.c
@@ -662,7 +662,9 @@ gdbpy_apply_val_pretty_printer (const struct extension_language_defn *extlang,
   struct gdbarch *gdbarch = get_type_arch (type);
   struct value *value;
   enum string_repr_result print_result;
-  const gdb_byte *valaddr = value_contents_for_printing (val);
+
+  if (value_lazy (val))
+    value_fetch_lazy (val);
 
   /* No pretty-printer support for unavailable values.  */
   if (!value_bytes_available (val, embedded_offset, TYPE_LENGTH (type)))
-- 
2.13.6