dmusic: Use the ARRAY_SIZE() macro.

dlls/dmusic/dmusic.c

@@ -301,7 +301,7 @@ static HRESULT WINAPI IDirectMusic8Impl_GetDefaultPort(LPDIRECTMUSIC8 iface, LPG
         return S_OK;
     }
     /* FIXME: Check return types to ensure we're interpreting data right */
-    MultiByteToWideChar(CP_ACP, 0, returnBuffer, -1, buff, sizeof(buff) / sizeof(WCHAR));
+    MultiByteToWideChar(CP_ACP, 0, returnBuffer, -1, buff, ARRAY_SIZE(buff));
     CLSIDFromString(buff, &defaultPortGUID);
     *guid_port = defaultPortGUID;
 

dlls/dmusic/dmusic_main.c

@@ -408,7 +408,7 @@ const char *debugstr_dmguid (const GUID *id) {
 
         if (!id) return "(null)";
 
-	for (i = 0; i < sizeof(guids)/sizeof(guids[0]); i++) {
+	for (i = 0; i < ARRAY_SIZE(guids); i++) {
 		if (IsEqualGUID(id, guids[i].guid))
 			return guids[i].name;
 	}
@@ -452,7 +452,7 @@ static const char *debugstr_DMUS_OBJ_FLAGS (DWORD flagmask) {
 	    FE(DMUS_OBJ_MEMORY),
 	    FE(DMUS_OBJ_STREAM)
 	};
-    return debugstr_flags (flagmask, flags, sizeof(flags)/sizeof(flags[0]));
+    return debugstr_flags(flagmask, flags, ARRAY_SIZE(flags));
 }
 
 /* Dump whole DMUS_OBJECTDESC struct */
@@ -484,7 +484,7 @@ static const char* debugstr_DMUS_PORTPARAMS_FLAGS(DWORD flagmask)
         FE(DMUS_PORTPARAMS_EFFECTS),
         FE(DMUS_PORTPARAMS_SHARE)
     };
-    return debugstr_flags(flagmask, flags, sizeof(flags)/sizeof(flags[0]));
+    return debugstr_flags(flagmask, flags, ARRAY_SIZE(flags));
 }
 
 /* Dump whole DMUS_PORTPARAMS struct */