patch 8.1.1086: too many curly braces

Problem:    Too many curly braces.
Solution:   Remove curly braces where they are not needed. (Hirohito Higashi,
            closes #3982)
diff --git a/src/spell.c b/src/spell.c
index a778896..99283fc 100644
--- a/src/spell.c
+++ b/src/spell.c
@@ -445,9 +445,8 @@
     if (spell_iswordp(mi.mi_fend, wp))
     {
 	do
-	{
 	    MB_PTR_ADV(mi.mi_fend);
-	} while (*mi.mi_fend != NUL && spell_iswordp(mi.mi_fend, wp));
+	while (*mi.mi_fend != NUL && spell_iswordp(mi.mi_fend, wp));
 
 	if (capcol != NULL && *capcol == 0 && wp->w_s->b_cap_prog != NULL)
 	{
@@ -1463,9 +1462,8 @@
 
     p = mip->mi_fend;
     do
-    {
 	MB_PTR_ADV(mip->mi_fend);
-    } while (*mip->mi_fend != NUL && spell_iswordp(mip->mi_fend, mip->mi_win));
+    while (*mip->mi_fend != NUL && spell_iswordp(mip->mi_fend, mip->mi_win));
 
     /* Include the non-word character so that we can check for the word end. */
     if (*mip->mi_fend != NUL)