[Ada] Don't emit style errors when parens are required

[Ada] Don't emit style errors when parens are required

[Pierre-Marie de Rodat]

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GNAT currently emits style errors for declare expressions in conditions
even though their parens are required. This commit fixes that.

Tested on x86_64-pc-linux-gnu, committed on trunk

gcc/ada/

	* par-ch5.adb (P_Condition): Check if expression is declare
	expression.

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diff --git a/gcc/ada/par-ch5.adb b/gcc/ada/par-ch5.adb
--- a/gcc/ada/par-ch5.adb
+++ b/gcc/ada/par-ch5.adb
@@ -1299,17 +1299,16 @@ package body Ch5 is
 
          return Cond;
 
-      --  Otherwise check for redundant parentheses
-
-      --  If the condition is a conditional or a quantified expression, it is
-      --  parenthesized in the context of a condition, because of a separate
-      --  syntax rule.
+      --  Otherwise check for redundant parentheses but do not emit messages
+      --  about expressions that require parentheses (e.g. conditional,
+      --  quantified or declaration expressions).
 
       else
          if Style_Check
            and then
              Paren_Count (Cond) >
                (if Nkind (Cond) in N_Case_Expression
+                                 | N_Expression_With_Actions
                                  | N_If_Expression
                                  | N_Quantified_Expression
                 then 1