Qualify some (remapped) field references which the preprocesser ignored

The preprocessor should have complained about these but it didn't for
some reason. This commit isn't fixing any imminent bug, it's just
precautionary (and required to compile once the preprocessor is fixed).

src/main/java/com/replaymod/replay/ReplayHandler.java

@@ -585,7 +585,7 @@ public class ReplayHandler {
                     //$$ public void drawScreen(int mouseX, int mouseY, float partialTicks) {
                     //#endif
                         renderDirtBackground(0);
-                        drawCenteredString(minecraft.textRenderer, I18n.translate("replaymod.gui.pleasewait"),
+                        drawCenteredString(this.minecraft.textRenderer, I18n.translate("replaymod.gui.pleasewait"),
                                 width / 2, height / 2, 0xffffffff);
                     }
                 };