updated for version 7.3.1294
Problem:    ":diffoff" resets options.
Solution:   Save and restore option values. (Christian Brabandt)
diff --git a/src/option.c b/src/option.c
index 8911b01..e91ef5d 100644
--- a/src/option.c
+++ b/src/option.c
@@ -10118,14 +10118,19 @@
     to->wo_stl = vim_strsave(from->wo_stl);
 #endif
     to->wo_wrap = from->wo_wrap;
+#ifdef FEAT_DIFF
+    to->wo_wrap_save = from->wo_wrap_save;
+#endif
 #ifdef FEAT_LINEBREAK
     to->wo_lbr = from->wo_lbr;
 #endif
 #ifdef FEAT_SCROLLBIND
     to->wo_scb = from->wo_scb;
+    to->wo_scb_save = from->wo_scb_save;
 #endif
 #ifdef FEAT_CURSORBIND
     to->wo_crb = from->wo_crb;
+    to->wo_crb_save = from->wo_crb_save;
 #endif
 #ifdef FEAT_SPELL
     to->wo_spell = from->wo_spell;
@@ -10137,6 +10142,7 @@
 #endif
 #ifdef FEAT_DIFF
     to->wo_diff = from->wo_diff;
+    to->wo_diff_saved = from->wo_diff_saved;
 #endif
 #ifdef FEAT_CONCEAL
     to->wo_cocu = vim_strsave(from->wo_cocu);
@@ -10144,11 +10150,16 @@
 #endif
 #ifdef FEAT_FOLDING
     to->wo_fdc = from->wo_fdc;
+    to->wo_fdc_save = from->wo_fdc_save;
     to->wo_fen = from->wo_fen;
+    to->wo_fen_save = from->wo_fen_save;
     to->wo_fdi = vim_strsave(from->wo_fdi);
     to->wo_fml = from->wo_fml;
     to->wo_fdl = from->wo_fdl;
+    to->wo_fdl_save = from->wo_fdl_save;
     to->wo_fdm = vim_strsave(from->wo_fdm);
+    to->wo_fdm_save = from->wo_diff_saved
+			      ? vim_strsave(from->wo_fdm_save) : empty_option;
     to->wo_fdn = from->wo_fdn;
 # ifdef FEAT_EVAL
     to->wo_fde = vim_strsave(from->wo_fde);
@@ -10180,6 +10191,7 @@
 #ifdef FEAT_FOLDING
     check_string_option(&wop->wo_fdi);
     check_string_option(&wop->wo_fdm);
+    check_string_option(&wop->wo_fdm_save);
 # ifdef FEAT_EVAL
     check_string_option(&wop->wo_fde);
     check_string_option(&wop->wo_fdt);
@@ -10210,6 +10222,7 @@
 #ifdef FEAT_FOLDING
     clear_string_option(&wop->wo_fdi);
     clear_string_option(&wop->wo_fdm);
+    clear_string_option(&wop->wo_fdm_save);
 # ifdef FEAT_EVAL
     clear_string_option(&wop->wo_fde);
     clear_string_option(&wop->wo_fdt);