patch 8.0.1495: having 'pumwidth' default to zero has no merit
Problem: Having 'pumwidth' default to zero has no merit.
Solution: Make the default 15, as the actual default value.
diff --git a/src/option.c b/src/option.c
index 5e215d5..e54ba4e 100644
--- a/src/option.c
+++ b/src/option.c
@@ -2245,7 +2245,7 @@
#else
(char_u *)NULL, PV_NONE,
#endif
- {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
+ {(char_u *)15L, (char_u *)15L} SCRIPTID_INIT},
{"pythonthreedll", NULL, P_STRING|P_EXPAND|P_VI_DEF|P_SECURE,
#if defined(DYNAMIC_PYTHON3)
(char_u *)&p_py3dll, PV_NONE,