[gcc r12-7375] libgcc: fix a warning calling find_fde_tail

[Xi Ruoyao]

https://gcc.gnu.org/g:157cc4e0117756503c7c63df97cf31de7570b088

commit r12-7375-g157cc4e0117756503c7c63df97cf31de7570b088
Author: Xi Ruoyao <xry111@mengyan1223.wang>
Date:   Fri Feb 25 01:45:57 2022 +0800

    libgcc: fix a warning calling find_fde_tail
    
    The third parameter of find_fde_tail is an _Unwind_Ptr (which is an
    integer type instead of a pointer), but we are passing NULL to it.  This
    causes a -Wint-conversion warning.
    
    libgcc/
    
            * unwind-dw2-fde-dip.c (_Unwind_Find_FDE): Call find_fde_tail
            with 0 instead of NULL.

Diff:
---
 libgcc/unwind-dw2-fde-dip.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libgcc/unwind-dw2-fde-dip.c b/libgcc/unwind-dw2-fde-dip.c
index 3d6f39f5460..7f9be5e6b02 100644
--- a/libgcc/unwind-dw2-fde-dip.c
+++ b/libgcc/unwind-dw2-fde-dip.c
@@ -514,7 +514,7 @@ _Unwind_Find_FDE (void *pc, struct dwarf_eh_bases *bases)
 # if DLFO_STRUCT_HAS_EH_DBASE
 			    (_Unwind_Ptr) dlfo.dlfo_eh_dbase,
 # else
-			    NULL,
+			    0,
 # endif
 			    bases);
     else