Adjust pgindent for newer awks.

Nigel J. Andrews

src/tools/pgindent/pgindent

@@ -55,7 +55,7 @@ do
 			    line1 !~ "^typedef" &&
 			    line1 !~ "^extern[ 	][ 	]*\"C\"" &&
 			    line1 !~ "=" &&
-			    line1 ~ ")")
+			    line1 ~ "\)")
 				print "int	pgindent_func_no_var_fix;";
 			line1 = line2;
 		}