missing forward declaration of pt_regs (asm-m68k/signal.h)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 signal.h |    1 +
 1 file changed, 1 insertion(+)

--- a/include/asm-m68k/signal.h
+++ b/include/asm-m68k/signal.h
@@ -198,6 +198,7 @@ static inline int sigfindinword(unsigned
 	return word ^ 31;
 }
 
+struct pt_regs;
 extern void ptrace_signal_deliver(struct pt_regs *regs, void *cookie);
 
 #endif /* __KERNEL__ */