Look for data.zip in the OSDirectory

For FreeBSD user it mean that they can just pkg install VVVVVV
once the package will be available and copy the data.zip in
~/.local/share/VVVVVV as the executable will be in
/usr/local/bin/ and users do not have the permission to write files
in this directory.

Signed-off-by: Emmanuel Vadot <manu@freebsd.org>

desktop_version/src/FileSystemUtils.cpp

@@ -73,6 +73,12 @@ int FILESYSTEM_init(char *argvZero)
 #ifdef _WIN32
 	strcpy(output, PHYSFS_getBaseDir());
 	strcat(output, "data.zip");
+#elif defined(__FreeBSD__)
+	PLATFORM_getOSDirectory(output);
+	if (strlcat(output, "data.zip", sizeof(output)) >= sizeof(output)) {
+		puts("Cannot find location for data.zip\n");
+		return 0;
+	}
 #else
 	strcpy(output, "data.zip");
 #endif