[PATCH] RISC-V: Restore the typcast to 64bit type

[Khem Raj]

this makes the type promotions clear and explicit
It was already typecasted to long but was accidentally dropped in [1]
which stated to cause failures on riscv32 as reported in [2]

[1] 
https://git.savannah.gnu.org/cgit/grub.git/commit/?id=2bf40e9e5be9808b17852e688eead87acff14420
[2] https://savannah.gnu.org/bugs/index.php?60283

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Cc: Andreas Schwab <schwab@suse.de>
Cc: Daniel Kiper <daniel.kiper@oracle.com>
Cc: Chester Lin <clin@suse.com>
Cc: Alistair Francis <alistair.francis@wdc.com>
---
 util/grub-mkimagexx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/util/grub-mkimagexx.c b/util/grub-mkimagexx.c
index 00f49ccaa..ac677d03d 100644
--- a/util/grub-mkimagexx.c
+++ b/util/grub-mkimagexx.c
@@ -1242,7 +1242,7 @@ SUFFIX (relocate_addrs) (Elf_Ehdr *e, struct 
section_metadata *smd,
                  */
 
                 sym_addr += addend;
-                off = sym_addr - target_section_addr - offset - 
image_target->vaddr_offset;
+                off = (grub_int64_t)sym_addr - target_section_addr - offset - 
image_target->vaddr_offset;
 
                 switch (ELF_R_TYPE (info))
                   {
-- 
2.31.1