Remove shadowed declarations, undefined identifiers, and specify argument types where it is required. (#1601)

JerryScript-DCO-1.0-Signed-off-by: Robert Sipka rsipka.uszeged@partner.samsung.com

tests/unit/test-strings.c

@@ -100,7 +100,7 @@ generate_cesu8_string (lit_utf8_byte_t *buf_p,
 } /* generate_cesu8_string */
 
 int
-main ()
+main (void)
 {
   TEST_INIT ();