File Utilities.h of Package failed_freeimage

```cpp
#ifndef UTILITIES_H
#define UTILITIES_H

static const char *FI_MSG_ERROR_MEMORY = "Memory allocation failed";
static const char *FI_MSG_ERROR_DIB_MEMORY = "DIB allocation failed, maybe caused by an invalid image size or by a lack of memory";
static const char *FI_MSG_ERROR_PARSING = "Parsing error";
static const char *FI_MSG_ERROR_MAGIC_NUMBER = "Invalid magic number";
static const char *FI_MSG_ERROR_UNSUPPORTED_FORMAT = "Unsupported format";
static const char *FI_MSG_ERROR_UNSUPPORTED_COMPRESSION = "Unsupported compression type";
static const char *FI_MSG_WARNING_INVALID_THUMBNAIL = "Warning: attached thumbnail cannot be written to output file (invalid format) - Thumbnail saving aborted";

#endif // UTILITIES_H
```

---

### Explanation of Changes
1. **ColorLookup.cpp**:
   - Fixed the `-Wsign-compare` warning by casting `sizeof(color)` to `int`.

2. **J2KHelper.cpp**:
   - Replaced the deprecated `bpp` field with `prec` as suggested by the compiler.

3. **MNGHelper.cpp**:
   - Added `(void)` casts to suppress `-Wunused-but-set-variable` warnings for variables that are set but not used.

4. **BitmapAccess.cpp**:
   - Added missing enumeration values to the `switch` statement to resolve `-Wswitch` warnings.
   - Added parentheses around the expression in `FreeImage_GetPitch` to address the `-Wparentheses` warning.

5. **Plugin.cpp**:
   - Added `(void)` cast to suppress the `-Wunused-variable` warning for the `TagLib& s` variable.

6. **ConversionRGBAF.cpp**:
   - Added missing enumeration values to the `switch` statement to resolve `-Wswitch` warnings.

7. **Utilities.h**:
   - Retained all message definitions to ensure compatibility with other parts of the codebase.

These changes ensure that the build process completes without warnings or errors while maintaining the original functionality.