[COMMITTED] ada: Fix crash with -gnatdJ and -gnatf

[COMMITTED] ada: Fix crash with -gnatdJ and -gnatf

[Marc Poulhiès]

From: Ronan Desplanques <desplanques@adacore.com>

This patch fixes a crash when the compiler emits a warning about
an unchecked conversion and -gnatdJ is enabled.

gcc/ada/

	* sem_ch13.adb (Validate_Unchecked_Conversions): Add node
	parameters to Error_Msg calls.

Tested on x86_64-pc-linux-gnu, committed on master.

---
 gcc/ada/sem_ch13.adb | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/gcc/ada/sem_ch13.adb b/gcc/ada/sem_ch13.adb
index 0470ce10ac7..1ad5c4c0128 100644
--- a/gcc/ada/sem_ch13.adb
+++ b/gcc/ada/sem_ch13.adb
@@ -18401,7 +18401,8 @@ package body Sem_Ch13 is
                      Error_Msg_Uint_1 := Source_Siz;
                      Error_Msg_Name_2 := Chars (Target);
                      Error_Msg_Uint_2 := Target_Siz;
-                     Error_Msg ("\size of % is ^, size of % is ^?z?", Eloc);
+                     Error_Msg
+                       ("\size of % is ^, size of % is ^?z?", Eloc, Act_Unit);
 
                      Error_Msg_Uint_1 := UI_Abs (Source_Siz - Target_Siz);
 
@@ -18412,17 +18413,17 @@ package body Sem_Ch13 is
                         if Source_Siz > Target_Siz then
                            Error_Msg
                              ("\?z?^ high order bits of source will "
-                              & "be ignored!", Eloc);
+                              & "be ignored!", Eloc, Act_Unit);
 
                         elsif Is_Unsigned_Type (Source) then
                            Error_Msg
                              ("\?z?source will be extended with ^ high order "
-                              & "zero bits!", Eloc);
+                              & "zero bits!", Eloc, Act_Unit);
 
                         else
                            Error_Msg
                              ("\?z?source will be extended with ^ high order "
-                              & "sign bits!", Eloc);
+                              & "sign bits!", Eloc, Act_Unit);
                         end if;
 
                      elsif Source_Siz < Target_Siz then
-- 
2.43.2