move prototypes around so they show up when needed

--- a/jobs.h
+++ b/jobs.h
@@ -182,6 +182,7 @@
 
 extern int count_all_jobs __P((void));
 
+extern void close_pgrp_pipe __P((void));
 extern void terminate_current_pipeline __P((void));
 extern void terminate_stopped_jobs __P((void));
 extern void hangup_all_jobs __P((void));
--- a/lib/glob/strmatch.c
+++ b/lib/glob/strmatch.c
@@ -25,9 +25,6 @@
 #include "strmatch.h"
 
 extern int xstrmatch __P((char *, char *, int));
-#if defined (HAVE_MULTIBYTE)
-extern int internal_wstrmatch __P((wchar_t *, wchar_t *, int));
-#endif
 
 int
 strmatch (pattern, string, flags)
--- a/lib/glob/strmatch.h
+++ b/lib/glob/strmatch.h
@@ -57,6 +57,7 @@
 
 #if HANDLE_MULTIBYTE
 extern int wcsmatch __P((wchar_t *, wchar_t *, int));
+extern int internal_wstrmatch __P((wchar_t *, wchar_t *, int));
 #endif
 
 #endif /* _STRMATCH_H */
--- a/quit.h
+++ b/quit.h
@@ -21,6 +21,8 @@
 #if !defined (_QUIT_H_)
 #define _QUIT_H_
 
+#include "sig.h"
+
 /* Non-zero means SIGINT has already ocurred. */
 extern volatile int interrupt_state;
 extern volatile int terminating_signal;