patch 9.1.0594: Unnecessary redraw when setting 'winfixbuf'

Problem:  Unnecessary redraw when setting 'winfixbuf'.
Solution: Remove P_RWIN flag. (zeertzjq)

closes: #15283

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/optiondefs.h b/src/optiondefs.h
index bf3ed35..b544619 100644
--- a/src/optiondefs.h
+++ b/src/optiondefs.h
@@ -2855,13 +2855,13 @@
     {"window",	    "wi",   P_NUM|P_VI_DEF,
 			    (char_u *)&p_window, PV_NONE, did_set_window, NULL,
 			    {(char_u *)0L, (char_u *)0L} SCTX_INIT},
-    {"winfixbuf", "wfb", P_BOOL|P_VI_DEF|P_RWIN,
+    {"winfixbuf", "wfb",    P_BOOL|P_VI_DEF,
 			    (char_u *)VAR_WIN, PV_WFB, NULL, NULL,
 			    {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
     {"winfixheight", "wfh", P_BOOL|P_VI_DEF|P_RSTAT,
 			    (char_u *)VAR_WIN, PV_WFH, NULL, NULL,
 			    {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
-    {"winfixwidth", "wfw", P_BOOL|P_VI_DEF|P_RSTAT,
+    {"winfixwidth", "wfw",  P_BOOL|P_VI_DEF|P_RSTAT,
 			    (char_u *)VAR_WIN, PV_WFW, NULL, NULL,
 			    {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
     {"winheight",   "wh",   P_NUM|P_VI_DEF,
@@ -2871,7 +2871,7 @@
     {"winminheight", "wmh", P_NUM|P_VI_DEF,
 			    (char_u *)&p_wmh, PV_NONE, did_set_winminheight, NULL,
 			    {(char_u *)1L, (char_u *)0L} SCTX_INIT},
-    {"winminwidth", "wmw", P_NUM|P_VI_DEF,
+    {"winminwidth", "wmw",  P_NUM|P_VI_DEF,
 			    (char_u *)&p_wmw, PV_NONE, did_set_winminwidth, NULL,
 			    {(char_u *)1L, (char_u *)0L} SCTX_INIT},
     {"winptydll", NULL,	    P_STRING|P_EXPAND|P_VI_DEF|P_SECURE,