Correct the total number of CD tracks

For the CD track -> MP3 file mapping to work correctly.
Also updated README with a note about supported MP3 tags.

README.md

@@ -3,6 +3,8 @@
 Small ASI plugin that fixes the issue with not playing correct MP3 files when playing expansion packs/mods with the old pre-Steam version of Half-Life.
 For example, you would always hear the Half-Life soundtrack even if playing Half-Life: Opposing Force.
 
+It also fixes the issue with the MP3 file associated with the last track not playing.
+
 Ability to play MP3 files as a substitute for playing soundtrack from CD first appeared with patch 1.1.0.9. It's an undocumented feature that only
 became official with Steam version of Half-Life. Refer to the following list to see how to name MP3 files after ripping them from Half-Life CD:
 
@@ -35,6 +37,9 @@ became official with Steam version of Half-Life. Refer to the following list to
 27. Suspense05.mp3
 28. Suspense07.mp3
 
+**Important:** The MP3 decoder used in the old version of Half-Life doesn't understand ID3v2 tags commonly added by CD ripping software and such MP3s
+won't be played. Make sure your ripping software offers ability to use ID3v1 tags instead. They may also be omitted entirely.
+
 The files go into following folders. The above list can be used when ripping CDs of the expansion packs, the only difference is they have less tracks.
 
 ### Half-Life

dllmain.c

@@ -63,6 +63,14 @@ fail:		return FALSE;
 
 		free(pVersionInfo);
 
+		dwPatchBase = 0x404541;
+		if (*(BYTE *)dwPatchBase == 27)
+		{
+			VirtualProtect((LPVOID)dwPatchBase, sizeof(BYTE), PAGE_EXECUTE_READWRITE, &dwOldProtect);
+			*(BYTE *)dwPatchBase = 28;
+			VirtualProtect((LPVOID)dwPatchBase, sizeof(BYTE), dwOldProtect, &dwOldProtect);
+		}
+
 		dwPatchBase = 0x4AD7E8;
 		VirtualProtect((LPVOID)dwPatchBase, sizeof(DWORD_PTR), PAGE_READWRITE, &dwOldProtect);