Move a few prototypes and static'ed a few functions

Moved prototypes for initialise() and action() from main.c to advent.h
Made the following functions static, so they wouldn't require prototypes:
   sig_handler (main.c)
   spotted_by_pirate (main.c)
   light (actions.c)

Makefile

@@ -26,6 +26,8 @@ VERS=1.0
 
 CC?=gcc
 CCFLAGS+=-std=c99 -D _DEFAULT_SOURCE -Wall -Wpedantic -Wextra -g
+CCFLAGS+=-Wstrict-prototypes
+CCFLAGS+=-Wmissing-prototypes
 LIBS=
 UNAME_S := $(shell uname -s)
 ifeq ($(UNAME_S),Linux)
@@ -75,6 +77,7 @@ clean:
 	rm -f newdb.c newdb.h
 	rm -f README advent.6 MANIFEST *.tar.gz
 	rm -f *~
+	rm -f .*~
 	cd tests; $(MAKE) --quiet clean
 
 check: advent

actions.c

@@ -633,7 +633,7 @@ static int inven(void)
     return GO_CLEAROBJ;
 }
 
-int light(token_t verb, token_t obj)
+static int light(token_t verb, token_t obj)
 /*  Light.  Applicable only to lamp and urn. */
 {
     int spk = ACTSPK[verb];

advent.h

@@ -171,6 +171,9 @@ extern long AMBER, ATTACK, AXE, BACK, BATTER, BEAR,
 
 enum speechpart {unknown, intransitive, transitive};
 
+void initialise(void);
+int action(FILE *input, enum speechpart part, long verb, token_t obj);
+
 /* Phase codes for action returns. 
  * These were at one time FORTRAN line numbers.
  * The values don't matter, but perturb their order at your peril.

main.c

@@ -48,10 +48,7 @@ bool oldstyle = false;
 bool editline = true;
 bool prompt = true;
 
-extern void initialise();
-extern int action(FILE *, long, long, long);
-
-void sig_handler(int signo)
+static void sig_handler(int signo)
 {
     if (signo == SIGINT){
 	if (logfp != NULL)
@@ -268,7 +265,7 @@ static void checkhints(FILE *cmdin)
     }
 }
 
-bool spotted_by_pirate(int i)
+static bool spotted_by_pirate(int i)
 {
     if (i != PIRATE) 
 	return false;