Assorted spelling fixes

dlls/ddraw/tests/dsurface.c

@@ -241,7 +241,7 @@ static void QueryInterface(void)
         return;
     }
 
-    /* Call IUnkown::QueryInterface */
+    /* Call IUnknown::QueryInterface */
     ret = IDirectDrawSurface_QueryInterface(dsurface, 0, &object);
     ok(ret == DDERR_INVALIDPARAMS, "IDirectDrawSurface::QueryInterface returned %lx\n", ret);
 

dlls/user/edit.c

@@ -155,7 +155,7 @@ typedef struct
 	/*
 	 * IME Data
 	 */
-	UINT composition_len;   /* lenght of composition, 0 == no composition */
+	UINT composition_len;   /* length of composition, 0 == no composition */
 	int composition_start;  /* the character position for the composition */
 } EDITSTATE;