[COMMITTED] __libdw_cu_addr_base: Cast offset to uintptr_t before returning as pointer.

[Mark Wielaard]

Fixes a GCC compile issue on the elfutils-debian-i686 buildbot builder:

dwarf_getlocation_attr.c: In function ‘addr_valp’:
dwarf_getlocation_attr.c:62:12: error: cast to pointer from integer of 
different size [-Werror=int-to-pointer-cast]
     return (unsigned char *) offset;
            ^
cc1: all warnings being treated as errors

Signed-off-by: Mark Wielaard <m...@klomp.org>
---
 libdw/ChangeLog                | 5 +++++
 libdw/dwarf_getlocation_attr.c | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/libdw/ChangeLog b/libdw/ChangeLog
index 526c91f..fd59a24 100644
--- a/libdw/ChangeLog
+++ b/libdw/ChangeLog
@@ -1,3 +1,8 @@
+2018-05-25  Mark Wielaard  <m...@klomp.org>
+
+       * dwarf_getlocation_attr.c (__libdw_cu_addr_base): Cast offset to
+       uintptr_t before returning as pointer.
+
 2018-05-22  Mark Wielaard  <m...@klomp.org>
 
        * dwarf_getlocation.c (__libdw_cu_base_address): Treat errors of
diff --git a/libdw/dwarf_getlocation_attr.c b/libdw/dwarf_getlocation_attr.c
index 62ef47a..9d7fd4b 100644
--- a/libdw/dwarf_getlocation_attr.c
+++ b/libdw/dwarf_getlocation_attr.c
@@ -59,7 +59,7 @@ addr_valp (Dwarf_CU *cu, Dwarf_Word index)
   Dwarf_Word offset = __libdw_cu_addr_base (cu) + (index * cu->address_size);
   if (debug_addr == NULL)
     /* This is really an error, will trigger with dwarf_formaddr.  */
-    return (unsigned char *) offset;
+    return (unsigned char *) (uintptr_t) offset;
 
   return (unsigned char *) debug_addr->d_buf + offset;
 }
-- 
1.8.3.1