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Moving tree printing once the full function is parsed

At the function level we can be sure the expresion will not be used again,
so it is the better place (for now) for printing it.

--- a/decl.c

+++ b/decl.c

@@ -143,7 +143,9 @@

 				      "type defaults to 'int' in declaration of '%s'",

 				      yytext);

 		} else if (new->type == FTN && yytoken == '{') {

-			compound();

+			struct node *np = compound();

+			prtree(np);

+			putchar('\n');

 			return;

 		}

 	} while (accept(','));

--- a/flow.c

+++ b/flow.c

@@ -120,7 +120,5 @@

 		addstmt(np, stmt());

 	del_ctx();

-	prtree(np);

-	putchar('\n');

 	return np;

 }