checker: fix anon fn using global variable (fix #15004) (#15008)

vlib/v/checker/checker.v

@@ -2771,6 +2771,14 @@ pub fn (mut c Checker) ident(mut node ast.Ident) ast.Type {
 		}
 		if mut obj := c.file.global_scope.find(name) {
 			match mut obj {
+				ast.GlobalField {
+					node.kind = .global
+					node.info = ast.IdentVar{
+						typ: obj.typ
+					}
+					node.obj = obj
+					return obj.typ
+				}
 				ast.ConstField {
 					if !(obj.is_pub || obj.mod == c.mod || c.pref.is_test) {
 						c.error('constant `$obj.name` is private', node.pos)

vlib/v/checker/tests/globals_run/global_var_in_anon_fn.run.out

@@ -0,0 +1 @@
+123

vlib/v/checker/tests/globals_run/global_var_in_anon_fn.vv

@@ -0,0 +1,16 @@
+module main
+
+__global (
+	number	int
+)
+
+fn init() {
+	number = 123
+}
+
+fn main() {
+	f1 := fn() {
+		println(number)
+	}
+	f1()
+}