Make pid2tcb static

* defs.h: Remove pid2tcb declaration.
* strace.c (pid2tcb): Make this function static.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/defs.h b/defs.h
index de5bd4b..59a8a09 100644
--- a/defs.h
+++ b/defs.h
@@ -597,7 +597,6 @@
 extern void set_personality(int personality);
 extern const char *xlookup(const struct xlat *, int);
 extern struct tcb *alloc_tcb(int, int);
-extern struct tcb *pid2tcb(int);
 extern void droptcb(struct tcb *);
 
 #define alloctcb(pid)	alloc_tcb((pid), 1)
diff --git a/strace.c b/strace.c
index 20c0266..782fe8f 100644
--- a/strace.c
+++ b/strace.c
@@ -1607,7 +1607,7 @@
 
 #endif /* USE_PROCFS */
 
-struct tcb *
+static struct tcb *
 pid2tcb(int pid)
 {
 	int i;