sh: Fix crash when undefining or redefining a currently executing function.

Add a reference count to function definitions.
Memory may leak if multiple SIGINTs arrive in interactive mode,
this will be fixed later by changing SIGINT handling.

PR:		bin/137640

1 files changed, 2 insertions, 1 deletions

diff --git a/bin/sh/exec.h b/bin/sh/exec.h
index 9f81a6a..e3b9acd 100644
--- a/bin/sh/exec.h
+++ b/bin/sh/exec.h
@@ -46,11 +46,12 @@ enum {
 	TYPECMD_TYPE		/* type */
 };
 
+union node;
 struct cmdentry {
 	int cmdtype;
 	union param {
 		int index;
-		union node *func;
+		struct funcdef *func;
 	} u;
 	int special;
 };