Issue#1533: Updated tests for variable_403 to protect against failure case.

Author: JHertz5

tests/variable/rule_403_test_input.fixed.vhd

@@ -47,6 +47,9 @@ begin
     others       => 'X'
   );
 
+    variable v_result : string(1 to
+    2);
+
   begin
 
   end process;

tests/variable/rule_403_test_input.vhd

@@ -38,6 +38,9 @@ begin
     others       => 'X'
   );
 
+    variable v_result : string(1 to
+    2);
+
   begin
 
   end process;