rs-client: Cleanup (#1087)

* rs-client: name SpriteBuffer

* rs-client: (re)name spritebuffer methods

* rs-client/deob: Add missed @Export's, make updatemappings fix this next time

* rs-client: run intellij redundant else inspection

* rs-client: invert some script interpreter if's

* deob: checkstyle fixes

* rs-client: SpriteBuffer_loadSprite -> SpriteBuffer_bufferFile

runescape-client/src/main/java/class40.java

@@ -79,9 +79,8 @@ public class class40 {
 	int method712(int var1) {
 		if (var1 != 9 && var1 != 10) {
 			return var1 == 11 ? 8 : var1;
-		} else {
-			return 1;
 		}
+		return 1;
 	}
 
 	@ObfuscatedName("p")