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Add parsing of initializers

A variable can be initialized with some data in the definition, and
this modification accept this initialzator, but it does nothing with
it.

--- a/decl.c

+++ b/decl.c

@@ -130,6 +130,26 @@

 		pushtype(*bp);

 }

+static struct node *

+initializer(register struct ctype *tp)

+{

+	register struct node *np;

+

+	if (accept('{')) {

+		np = nodecomp();

+		addstmt(np, initializer(tp));

+		while (accept(',')) {

+			if (accept('}'))

+				return np;

+			addstmt(np, initializer(tp));

+		}

+		expect('}');

+	} else {

+		np = expr();

+	}

+	return np;

+}

+

 static void

 listdcl(register struct ctype *tp)

 {

@@ -144,6 +164,8 @@

 			function(cursym);

 			return;

 		}

+		if (accept('='))

+			initializer(tp);

 	} while (accept(','));

 	expect(';');

 }

-- 

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