Update parser.h

Author: AzliRynz

parser.h

@@ -12,7 +12,7 @@ typedef enum {
     EXPR_ASSIGN
 } ExprType;
 
-typedef struct Expr {
+typedef struct {
     ExprType type;
     union {
         Value literal;
@@ -40,7 +40,7 @@ typedef enum {
     STMT_VAR
 } StmtType;
 
-typedef struct Stmt {
+typedef struct {
     StmtType type;
     union {
         Expr* expression;