Initialise some variables to keep gcc happy.

compile.c

@@ -527,7 +527,7 @@ static int compile(struct locfile* locations, struct bytecode* bc, block b) {
       int nargs = curr->imm.intval;
       assert(nargs > 0);
       code[pos++] = (uint16_t)nargs;
-      int desired_params;
+      int desired_params = 0;
       for (int i=0; i<nargs; i++) {
         curr = curr->next;
         assert(curr && opcode_describe(curr->op)->flags & OP_IS_CALL_PSEUDO);

jv_dtoa.c

@@ -2120,7 +2120,7 @@ bigcomp
  (struct dtoa_context* C, U *rv, const char *s0, BCinfo *bc)
 {
 	Bigint *b, *d;
-	int b2, bbits, d2, dd, dig, dsign, i, j, nd, nd0, p2, p5, speccase;
+	int b2, bbits, d2, dd=0, dig, dsign, i, j, nd, nd0, p2, p5, speccase;
 
 	dsign = bc->dsign;
 	nd = bc->nd;