fix emalloc prototype

src/cmd/9pfuse/a.h

diff --git a/src/cmd/9pfuse/a.h b/src/cmd/9pfuse/a.h
index 1ab5100..abe773d 100644
--- a/src/cmd/9pfuse/a.h
+++ b/src/cmd/9pfuse/a.h
@@ -42,8 +42,8 @@
 void		replyfuseerrstr(FuseMsg*);
 void		request9p(Fcall *tx);
 
-void*		emalloc(size_t n);
-void*		erealloc(void *p, size_t n);
+void*		emalloc(uint n);
+void*		erealloc(void *p, uint n);
 char*		estrdup(char *p);
 
 int		errstr2errno(void);