Fix: Reorder includes in main.c and fix uninitialized variable in optimizer.c

Author: ProgrammerKR

src/compiler/optimizer.c

@@ -20,7 +20,7 @@ static Expr* foldBinary(Expr* expr) {
             double b = AS_NUMBER(rv);
             const char* op = expr->as.binary.operator;
 
-            Value res;
+            Value res = NIL_VAL;
             bool folded = true;
 
             if (strcmp(op, "+") == 0) res = NUMBER_VAL(a + b);

src/main.c

@@ -22,6 +22,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include "type_checker.h"
+#include "optimizer.h"
 
 #ifdef _WIN32
 #include <process.h>
@@ -151,9 +153,6 @@ static char *readFile(const char *path) {
   return buffer;
 }
 
-#include "type_checker.h"
-#include "optimizer.h"
-
 static void runFile(const char *path) {
   char *source = readFile(path);
   if (source == NULL) {