patch 9.0.0712: wrong column when calling setcursorcharpos() with zero lnum

Problem:    Wrong column when calling setcursorcharpos() with zero lnum.
Solution:   Set the line number before calling buf_charidx_to_byteidx().
            (closes #11329)
diff --git a/src/version.c b/src/version.c
index d3189fb..eef7ff1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    712,
+/**/
     711,
 /**/
     710,