silence various warnings

src/cmd/9p.c

@@ -336,10 +336,8 @@ timefmt(Fmt *fmt)
 	if((long)(time0-u) < 6*30*86400)
 		return fmtprint(fmt, "%s %2d %02d:%02d",
 			mon[tm->mon], tm->mday, tm->hour, tm->min);
-	else
-		return fmtprint(fmt, "%s %2d %5d",
-			mon[tm->mon], tm->mday, tm->year+1900);
-	return 0;
+	return fmtprint(fmt, "%s %2d %5d",
+		mon[tm->mon], tm->mday, tm->year+1900);
 }
 
 static int

src/cmd/auth/factotum/conv.c

@@ -105,7 +105,7 @@ convgetrpc(Conv *c, int want)
 			return &c->rpc;
 		rpcrespond(c, "phase in state '%s' want '%s'", c->state, rpcname[want]);
 	}
-	return nil;	/* not reached */
+	/* not reached */
 }
 
 /* read until the done function tells us that's enough */

src/cmd/auth/factotum/fs.c

@@ -159,7 +159,7 @@ readlist(int off, int (*gen)(int, char*, uint), Req *r)
 		a += n;
 		off++;
 	}
-	return -1;		/* not reached */
+	/* not reached */
 }
 
 static int

src/cmd/lex/ncform

@@ -157,7 +157,7 @@ yylook(void){
 		if(debug)putchar('\n');
 # endif
 		}
-	return(0);	/* shut up the compiler; i have no idea what should be returned */
+	/* not reached */
 	}
 int
 yyback(int *p, int m)

src/cmd/listen1.c

@@ -102,5 +102,4 @@ main(int argc, char **argv)
 			break;
 		}
 	}
-	exits(nil);
 }

src/cmd/proof/screen.c

@@ -88,7 +88,6 @@ getcmdstr(void)
 			}
 		}
 	}
-	return nil;
 }
 
 static char *

src/cmd/spell/sprog.c

@@ -591,7 +591,6 @@ main(int argc, char *argv[])
 		} else if(affix[0] != 0 && affix[0] != '.')
 			print("%s\t%s\n", affix, original);
 	}
-	exits(0);
 }
 
 /*	strip exactly one suffix and do

src/cmd/venti/srv/dat.h

@@ -75,17 +75,17 @@ enum
 	/*
 	 * magic numbers on disk
 	 */
-	_ClumpMagic		= 0xd15cb10c,	/* clump header, deprecated */
+	_ClumpMagic		= 0xd15cb10cU,	/* clump header, deprecated */
 	ClumpFreeMagic		= 0,		/* free clump; terminates active clump log */
 
-	ArenaPartMagic		= 0xa9e4a5e7,	/* arena partition header */
-	ArenaMagic		= 0xf2a14ead,	/* arena trailer */
-	ArenaHeadMagic		= 0xd15c4ead,	/* arena header */
+	ArenaPartMagic		= 0xa9e4a5e7U,	/* arena partition header */
+	ArenaMagic		= 0xf2a14eadU,	/* arena trailer */
+	ArenaHeadMagic		= 0xd15c4eadU,	/* arena header */
 	
-	BloomMagic		= 0xb1004ead,	/* bloom filter header */
+	BloomMagic		= 0xb1004eadU,	/* bloom filter header */
 	BloomMaxHash	= 32,
 
-	ISectMagic		= 0xd15c5ec7,	/* index header */
+	ISectMagic		= 0xd15c5ec7U,	/* index header */
 
 	ArenaPartVersion	= 3,
 	ArenaVersion4		= 4,