Fix memory corruption

src/basic/win32.cpp

@@ -270,7 +270,7 @@ String GetExePath(Allocator allocator) {
 }
 
 String GetExeDir(Allocator allocator) {
-    Scratch scratch;
+    Scratch scratch((Arena *)allocator.object);
     String  path = GetExePath(scratch);
     path         = ChopLastSlash(path);
     path         = Copy(allocator, path);