Merge pull request #1857 from linquize/find-git-path-win32

Fix failure in win32 git path guessing

src/win32/findfile.c

@@ -130,9 +130,9 @@ static int win32_find_git_in_registry(
 
 	assert(buf);
 
-	path16.len = 0;
+	path16.len = MAX_PATH;
 
-	if (RegOpenKeyExW(hieve, key, 0, KEY_ALL_ACCESS, &hKey) == ERROR_SUCCESS) {
+	if (RegOpenKeyExW(hieve, key, 0, KEY_READ, &hKey) == ERROR_SUCCESS) {
 		if (RegQueryValueExW(hKey, L"InstallLocation", NULL, &dwType,
 			(LPBYTE)&path16.path, &path16.len) == ERROR_SUCCESS)
 		{