Implement platform-specific changelog path funcs

src/openrct2/platform/platform.h

@@ -128,6 +128,7 @@ uint8 platform_get_locale_measurement_format();
 uint8 platform_get_locale_temperature_format();
 uint8 platform_get_locale_date_format();
 bool platform_process_is_elevated();
+void platform_get_changelog_path(utf8 *outPath, size_t outSize);
 
 #ifndef NO_TTF
 bool platform_get_font_path(TTFFontDescriptor *font, utf8 *buffer, size_t size);

src/openrct2/platform/posix.c

@@ -842,4 +842,11 @@ bool platform_process_is_elevated()
    return (geteuid() == 0);
 }
 
+void platform_get_changelog_path(utf8 *outPath, size_t outSize)
+{
+    platform_get_openrct_data_path(outPath, outSize);
+    safe_strcat_path(outPath, "changelog.txt", outSize);
+}
+
+
 #endif

src/openrct2/platform/windows.c

@@ -454,6 +454,12 @@ void platform_get_openrct_data_path(utf8 *outPath, size_t outSize)
     safe_strcpy(outPath, _openrctDataDirectoryPath, outSize);
 }
 
+void platform_get_changelog_path(utf8 *outPath, size_t outSize)
+{
+    safe_strcpy(outPath, gExePath, outSize);
+    safe_strcat_path(outPath, "changelog.txt", outSize);
+}
+
 /**
  * Default directory fallback is:
  *   - (command line argument)

src/openrct2/windows/changelog.c

@@ -204,8 +204,7 @@ static bool window_changelog_read_file()
 {
     window_changelog_dispose_file();
     utf8 path[MAX_PATH];
-    platform_get_openrct_data_path(path, sizeof(path));
-    safe_strcat_path(path, "changelog.txt", MAX_PATH);
+    platform_get_changelog_path(path, sizeof(path));
     if (!readentirefile(path, (void**)&_changelogText, &_changelogTextSize)) {
         log_error("Unable to read changelog.txt");
         return false;