Allow the compiler with slightly older forms of the compiler which only have default_hasher and not default_hasher_fixed

src/check_type.cpp

@@ -4197,7 +4197,7 @@ gb_internal void add_map_key_type_dependencies(CheckerContext *ctx, Type *key) {
 		}
 
 		if (is_type_simple_compare(key)) {
-			add_package_dependency(ctx, "runtime", "default_hasher_fixed");
+			add_package_dependency(ctx, "runtime", runtime_default_hasher_fixed_name(&ctx->checker->info));
 			return;
 		}
 

src/checker.cpp

@@ -1035,6 +1035,10 @@ gb_internal void try_to_add_package_dependency(CheckerContext *c, char const *pa
 	add_dependency(c->info, c->decl, e);
 }
 
+gb_internal char const *runtime_default_hasher_fixed_name(CheckerInfo *info) {
+	Entity *e = scope_lookup_current(info->runtime_package->scope, string_interner_insert(str_lit("default_hasher_fixed")));
+	return e != nullptr ? "default_hasher_fixed" : "default_hasher";
+}
 
 gb_internal void add_declaration_dependency(CheckerContext *c, Entity *e) {
 	if (e == nullptr) {

src/llvm_backend.cpp

@@ -434,7 +434,7 @@ gb_internal lbValue lb_simple_compare_hash(lbProcedure *p, Type *type, lbValue d
 	args[0] = data;
 	args[1] = seed;
 	args[2] = lb_const_int(p->module, t_int, type_size_of(type));
-	return lb_emit_runtime_call(p, "default_hasher_fixed", args);
+	return lb_emit_runtime_call(p, runtime_default_hasher_fixed_name(p->module->info), args);
 }
 
 gb_internal void lb_add_callsite_force_inline(lbProcedure *p, lbValue ret_value) {