Dr Memory and "UNINITIALIZED READ" error when calling FindFirstFile

Here's the following code that I compile on my Windows PC:

#include <windows.h>

int main() {
    WIN32_FIND_DATA file = {0, {0, 0}, {0, 0}, {0, 0}, 0, 0, 0, 0, "", ""};
    HANDLE file_handle = INVALID_HANDLE_VALUE;

    file_handle = FindFirstFile("C:\\*", &file);
    if (file_handle != INVALID_HANDLE_VALUE)
        FindClose(file_handle);

    return 0;
}

When I run it through Dr. Memory, I get the following error:

Error #1: UNINITIALIZED READ: reading 0x0000004f792ff3f4-0x0000004f792ff3f8 4 byte(s) within 0x0000004f792ff3f0-0x0000004f792ff3f8
# 0 system call NtQueryDirectoryFileEx parameter value #6
# 1 KERNELBASE.dll!FindFirstFileExW
# 2 KERNELBASE.dll!FindFirstFileW
# 3 main  

I spent the whole day trying to figure out where the uninitialized read is, but I can't for the life of me figure it out. I thought this was maybe some sort of false positive (like this one) because I was compiling the code with GCC/MinGW, but it also happens with MSVC/Visual Studio.

As far as I understand it, file and file_handle are initialized, but I guess I'm missing something...

EDIT: "Some programmer dude" suggested that my issue might being related to me using narrow-character strings whereas wide-character strings are required. I tried the following code (which compiles fine with MSVC/Visual Studio, but not GCC/MinGW), but I get the same error with Dr. Memory:

#include <windows.h>

int main() {
    WIN32_FIND_DATA file = {0, {0, 0}, {0, 0}, {0, 0}, 0, 0, 0, 0, L"", L""};
    HANDLE file_handle = INVALID_HANDLE_VALUE;

    file_handle = FindFirstFile(L"C:\\*", &file);
    if (file_handle != INVALID_HANDLE_VALUE)
        FindClose(file_handle);

    return 0;
}