devd: Move variable declaration to header

Reminder by:	imp

sbin/devd/devd.cc

@@ -140,7 +140,6 @@ typedef struct client {
 } client_t;
 
 extern FILE *yyin;
-extern int lineno;
 
 static const char notify = '!';
 static const char nomatch = '?';

sbin/devd/devd.h

@@ -52,6 +52,7 @@ void set_variable(const char *, const char *);
 void yyerror(const char *s);
 int  yylex(void);
 int  yyparse(void);
+extern int lineno;
 __END_DECLS
 
 #define PATH_DEVCTL	"/dev/devctl"

sbin/devd/token.l

@@ -38,7 +38,6 @@
 #include "devd.h"
 #include "y.tab.h"
 
-extern int lineno;
 int lineno = 1;
 
 static void