Fix resolved direction for all neutral text

FriBiDi will treat the text as LTR if no base direction is set, so make
sure we set resolved dir the same way (i.e. treat FRIBIDI_PAR_ON as
FRIBIDI_PAR_LTR). SheenBiDi will report LTR base level in this case, but
I changed the code for consistency.

src/raqm.c

@@ -1348,10 +1348,10 @@ _raqm_bidi_itemize (raqm_t *rq, size_t *run_count)
   line = SBParagraphCreateLine (par, 0, par_len);
   *run_count = SBLineGetRunCount (line);
 
-  if (SBParagraphGetBaseLevel (par) == 0)
-    rq->resolved_dir = RAQM_DIRECTION_LTR;
-  else
+  if (SBParagraphGetBaseLevel (par) == 1)
     rq->resolved_dir = RAQM_DIRECTION_RTL;
+  else
+    rq->resolved_dir = RAQM_DIRECTION_LTR;
 
   runs = malloc (sizeof (_raqm_bidi_run) * (*run_count));
   if (runs)
@@ -1502,10 +1502,10 @@ _raqm_bidi_itemize (raqm_t *rq, size_t *run_count)
                                                    rq->text_len, &par_type,
                                                    levels);
 
-  if (par_type == FRIBIDI_PAR_LTR)
-    rq->resolved_dir = RAQM_DIRECTION_LTR;
-  else
+  if (par_type == FRIBIDI_PAR_RTL)
     rq->resolved_dir = RAQM_DIRECTION_RTL;
+  else
+    rq->resolved_dir = RAQM_DIRECTION_LTR;
 
   if (max_level == 0)
     goto done;