DShowPlugin: Don't use bad resolution if not found

If the source is set to a bad resolution, it never set the rendering
width/height to the new expected width/height.

DShowPlugin/DeviceSource.cpp

@@ -541,6 +541,9 @@ bool DeviceSource::LoadFilters()
             goto cleanFinish;
         } else { /* エルガット＝自殺 */
             bestOutput = &outputList[0];
+            renderCX = newCX = bestOutput->minCX;
+            renderCY = newCY = bestOutput->minCY;
+            frameInterval =  bestOutput->minFrameInterval;
         }
     }