[COMMITTED] ada: Fix -fdiagnostics-format=json not printing all messages

["Marc Poulhiès" <poulhies@adacore.com>]

From: Ghjuvan Lacambre <lacambre@adacore.com>

The previous version of this code stopped printing messages as soon as
it encountered a deleted or continuation message. This was wrong,
continuation and deleted messages can be followed by live messages that
do need to be printed.

gcc/ada/

	* errout.adb (Output_Messages): Fix loop termination condition.

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

---
 gcc/ada/errout.adb | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/gcc/ada/errout.adb b/gcc/ada/errout.adb
index 1c6222b3a29..6e378a60731 100644
--- a/gcc/ada/errout.adb
+++ b/gcc/ada/errout.adb
@@ -3062,16 +3062,19 @@ package body Errout is
 
             E := Errors.Table (E).Next;
 
-            --  Skip deleted messages.
-            --  Also skip continuation messages, as they have already been
-            --  printed along the message they're attached to.
+            while E /= No_Error_Msg loop
+
+               --  Skip deleted messages.
+               --  Also skip continuation messages, as they have already been
+               --  printed along the message they're attached to.
+
+               if not Errors.Table (E).Deleted
+                 and then not Errors.Table (E).Msg_Cont
+               then
+                  Write_Char (',');
+                  Output_JSON_Message (E);
+               end if;
 
-            while E /= No_Error_Msg
-              and then not Errors.Table (E).Deleted
-              and then not Errors.Table (E).Msg_Cont
-            loop
-               Write_Char (',');
-               Output_JSON_Message (E);
                E := Errors.Table (E).Next;
             end loop;
          end if;
-- 
2.40.0