patch 7.4.1631
Problem:    Compiler doesn't understand switch on all enum values. (Tony
            Mechelynck)
Solution:   Initialize variable.
diff --git a/src/channel.c b/src/channel.c
index 1f6df41..64393f9 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -2100,7 +2100,7 @@
     chanpart_T *chanpart = &channel->ch_part[part];
     char	namebuf[20];
     size_t	tail;
-    char	*s;
+    char	*s = "";
 
     STRCPY(namebuf, name);
     STRCAT(namebuf, "_");