cgen: fix match codegen for option match case (fix #25533) (#25537)

Author: felipensp

vlib/v/gen/c/match.v

@@ -431,11 +431,10 @@ fn (mut g Gen) match_expr_classic(node ast.MatchExpr, is_expr bool, cond_var str
 	node_cond_type_unsigned := node.cond_type in [ast.u16_type, ast.u32_type, ast.u64_type]
 	type_sym := g.table.final_sym(node.cond_type)
 	use_ternary := is_expr && tmp_var == ''
-	mut reset_if := false
+	mut reset_if := node.branches.any(it.exprs.any(g.match_must_reset_if(it)))
 	mut has_goto := false
 	for j, branch in node.branches {
 		is_last := j == node.branches.len - 1
-		reset_if = branch.exprs.any(g.match_must_reset_if(it))
 		if reset_if {
 			g.writeln('')
 			g.set_current_pos_as_last_stmt_pos()

vlib/v/tests/options/option_match_case_enum_test.v

@@ -0,0 +1,25 @@
+enum A_ {
+	b
+	c
+	d
+	e
+}
+
+fn test_main() {
+	mut a := ?A_(none)
+	a = .c
+	match true {
+		a == ?A_(.b) {
+			assert false
+		}
+		a == ?A_(.c) {
+			assert true
+		}
+		a == ?A_(.d) {
+			assert false
+		}
+		else {
+			assert false
+		}
+	}
+}