Add function prototypes.

mach/6805/as/mach1.c

@@ -11,3 +11,5 @@
 extern int opt_cmos;
 
 #define	fitj(z)		((unsigned)z + 0x80 <= 0xFF)
+
+void branch(register int opc,expr_t exp,expr_t cell);

mach/6805/as/mach4.c

@@ -31,7 +31,10 @@ operation
 			{	emit1($1);}
 	|
 		BRANCH expr
-			{	branch($1,$2);}
+			{
+                /* Empty expression */
+                struct expr_t expr = {0,0};
+                branch($1,$2,expr);}
 	|
 		BBRANCH bitexp ',' expr8 ',' expr
 			{

mach/6805/as/mach5.c

@@ -9,8 +9,9 @@
  */
 
 /* VARARGS2 */
-branch(opc,exp,cell) register opc; expr_t cell; expr_t exp; {
-	register sm, dist;
+void branch(register int opc,expr_t exp,expr_t cell)
+{
+	register int sm, dist;
 	int saving;
 
 	dist = exp.val - (DOTVAL + 2);