export getalias()

We will be using it in the new
coalesce() pass.

alias.c

@@ -1,6 +1,6 @@
 #include "all.h"
 
-static void
+void
 getalias(Alias *a, Ref r, Fn *fn)
 {
 	Con *c;

all.h

@@ -518,6 +518,7 @@ void memopt(Fn *);
 
 /* alias.c */
 void fillalias(Fn *);
+void getalias(Alias *, Ref, Fn *);
 int alias(Ref, int, Ref, int, int *, Fn *);
 int escapes(Ref, Fn *);