parser: fix struct init and assign using sql variable (#10968)

vlib/v/parser/parser.v

@@ -674,7 +674,7 @@ pub fn (mut p Parser) stmt(is_top_level bool) ast.Stmt {
 			return p.for_stmt()
 		}
 		.name {
-			if p.tok.lit == 'sql' {
+			if p.tok.lit == 'sql' && p.peek_tok.kind == .name {
 				return p.sql_stmt()
 			}
 			if p.peek_tok.kind == .colon {

vlib/v/parser/tests/sql_no_db_expr_a.out

@@ -1,6 +1,5 @@
-vlib/v/parser/tests/sql_no_db_expr_a.vv:3:6: error: invalid expression: unexpected token `:=`, expecting database
-    1 | fn x() {
+vlib/v/parser/tests/sql_no_db_expr_a.vv:4:1: error: invalid expression: unexpected token `}`
     2 |     // SqlStmt
     3 |     sql :=
-      |         ~~
     4 | }
+      | ^