updated for version 7.3.783

Problem:    Crash when mark is not set. (Dominique Pelle)
Solution:   Check for NULL.

src/normal.c

@@ -7552,6 +7552,7 @@ nv_gomark(cap)
 #endif
 #ifdef FEAT_FOLDING
     if (cap->oap->op_type == OP_NOP
+	    && pos != NULL
 	    && (pos == (pos_T *)-1 || !equalpos(old_cursor, *pos))
 	    && (fdo_flags & FDO_MARK)
 	    && old_KeyTyped)

src/version.c

@@ -725,6 +725,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    783,
 /**/
     782,
 /**/