winmm: Allow larger MMTIME sizes.

dlls/winmm/tests/wave.c

@@ -487,7 +487,12 @@ static void check_position(int device, HWAVEOUT wout, DWORD bytes,
     DWORD returned;
 
     mmtime.wType = TIME_BYTES;
-    rc=waveOutGetPosition(wout, &mmtime, sizeof(mmtime));
+    rc=waveOutGetPosition(wout, &mmtime, sizeof(mmtime) - 1);
+    ok(rc==MMSYSERR_ERROR,
+       "waveOutGetPosition(%s): rc=%s\n",dev_name(device),wave_out_error(rc));
+
+    mmtime.wType = TIME_BYTES;
+    rc=waveOutGetPosition(wout, &mmtime, sizeof(mmtime) + 1);
     ok(rc==MMSYSERR_NOERROR,
        "waveOutGetPosition(%s): rc=%s\n",dev_name(device),wave_out_error(rc));
     if (mmtime.wType != TIME_BYTES && winetest_debug > 1)

dlls/winmm/waveform.c

@@ -2981,9 +2981,12 @@ UINT WINAPI waveOutGetPosition(HWAVEOUT hWaveOut, LPMMTIME lpTime,
 {
     TRACE("(%p, %p, %u)\n", hWaveOut, lpTime, uSize);
 
-    if(!uSize || !lpTime || uSize != sizeof(MMTIME))
+    if(!uSize || !lpTime)
         return MMSYSERR_INVALPARAM;
 
+    if(uSize < sizeof(MMTIME))
+        return MMSYSERR_ERROR;
+
     return WINMM_GetPosition((HWAVE)hWaveOut, lpTime);
 }
 
@@ -3602,9 +3605,12 @@ UINT WINAPI waveInGetPosition(HWAVEIN hWaveIn, LPMMTIME lpTime,
 {
     TRACE("(%p, %p, %u)\n", hWaveIn, lpTime, uSize);
 
-    if(!uSize || !lpTime || uSize != sizeof(MMTIME))
+    if(!uSize || !lpTime)
         return MMSYSERR_INVALPARAM;
 
+    if(uSize < sizeof(MMTIME))
+        return MMSYSERR_ERROR;
+
     return WINMM_GetPosition((HWAVE)hWaveIn, lpTime);
 }