removed gcc-7 warnings
diff --git a/skeletons/constr_SET.c b/skeletons/constr_SET.c
index 4f0230c..994abb7 100644
--- a/skeletons/constr_SET.c
+++ b/skeletons/constr_SET.c
@@ -310,7 +310,7 @@
 				ADVANCE(rval.consumed);
 				RETURN(RC_WMORE);
 			}
-			/* Fail through */
+			/* Fall through */
 		case RC_FAIL: /* Fatal error */
 			RETURN(RC_FAIL);
 		} /* switch(rval) */
@@ -381,6 +381,7 @@
 		}
 
 		ctx->phase = 5;
+        /* Fall through */
 	case 5:
 		/* Check that all mandatory elements are present. */
 		if(!_SET_is_populated(td, st))