mmdevapi/tests: Fix the spelling of ok() messages.

dlls/mmdevapi/tests/propstore.c

@@ -111,7 +111,7 @@ static void test_getat(IPropertyStore *store)
     hr = IPropertyStore_GetCount(store, &propcount);
 
     ok(hr == S_OK, "Failed with %08x\n", hr);
-    ok(propcount > 0, "Propcount %d should be greather than zero\n", propcount);
+    ok(propcount > 0, "Propcount %d should be greater than zero\n", propcount);
 
     for (prop = 0; prop < propcount; prop++) {
 	hr = IPropertyStore_GetAt(store, prop, &pkey);

dlls/mmdevapi/tests/render.c

@@ -744,7 +744,7 @@ static void test_padding(void)
         /* win10 appears not to clear the buffer */
         for(i = 0; i < psize * pwfx->nBlockAlign; ++i){
             if(buf[i] != silence){
-                ok(0, "buffer has data in it already, i: %u, valu: %f\n", i, *((float*)buf));
+                ok(0, "buffer has data in it already, i: %u, value: %f\n", i, *((float*)buf));
                 break;
             }
         }