winmm: Unload driver if it reports zero devices

[Michal Janusz Miroslaw <M.Miroslaw@elka.pw.edu.pl>]

Fix FIXME in MMDRV_Install
    /* FIXME: if all those func calls return FALSE,
     * then the driver must be unloaded
     */

ChangeLog:
  - Unload MM driver if it reports zero devices

Index: dlls/winmm/lolvldrv.c
===================================================================
RCS file: /home/wine/wine/dlls/winmm/lolvldrv.c,v
retrieving revision 1.46
diff -u -r1.46 lolvldrv.c
--- dlls/winmm/lolvldrv.c	5 Sep 2003 23:08:28 -0000	1.46
+++ dlls/winmm/lolvldrv.c	19 Sep 2003 03:14:34 -0000
@@ -663,15 +663,20 @@
     lpDrv->drvname = strcpy(HeapAlloc(GetProcessHeap(), 0, strlen(drvRegName) + 1), drvRegName);
 
     /* Finish init and get the count of the devices */
-    MMDRV_InitPerType(lpDrv, MMDRV_AUX,		AUXDM_GETNUMDEVS);
-    MMDRV_InitPerType(lpDrv, MMDRV_MIXER,	MXDM_GETNUMDEVS);
-    MMDRV_InitPerType(lpDrv, MMDRV_MIDIIN, 	MIDM_GETNUMDEVS);
-    MMDRV_InitPerType(lpDrv, MMDRV_MIDIOUT, 	MODM_GETNUMDEVS);
-    MMDRV_InitPerType(lpDrv, MMDRV_WAVEIN, 	WIDM_GETNUMDEVS);
-    MMDRV_InitPerType(lpDrv, MMDRV_WAVEOUT, 	WODM_GETNUMDEVS);
-    /* FIXME: if all those func calls return FALSE,
-     * then the driver must be unloaded
-     */
+    i = 0;
+    if (MMDRV_InitPerType(lpDrv, MMDRV_AUX,     AUXDM_GETNUMDEVS))	i = 1;
+    if (MMDRV_InitPerType(lpDrv, MMDRV_MIXER,   MXDM_GETNUMDEVS))	i = 1;
+    if (MMDRV_InitPerType(lpDrv, MMDRV_MIDIIN,  MIDM_GETNUMDEVS))	i = 1;
+    if (MMDRV_InitPerType(lpDrv, MMDRV_MIDIOUT, MODM_GETNUMDEVS))	i = 1;
+    if (MMDRV_InitPerType(lpDrv, MMDRV_WAVEIN,  WIDM_GETNUMDEVS))	i = 1;
+    if (MMDRV_InitPerType(lpDrv, MMDRV_WAVEOUT, WODM_GETNUMDEVS))	i = 1;
+    /* if all those func calls return FALSE, then the driver must be unloaded */
+    if (!i) {
+	CloseDriver(lpDrv->hDriver, 0, 0);
+	HeapFree(GetProcessHeap(), 0, lpDrv->drvname);
+	WARN("Driver initialization failed\n");
+	return FALSE;
+    }
 
     MMDrvsHi++;