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/BufferedFile.java

@@ -100,9 +100,8 @@ public class BufferedFile {
 	public void seek(long var1) throws IOException {
 		if (var1 < 0L) {
 			throw new IOException("");
-		} else {
-			this.offset = var1;
 		}
+		this.offset = var1;
 	}
 
 	@ObfuscatedName("e")
@@ -392,18 +391,18 @@ public class BufferedFile {
 		ItemContainer var2 = (ItemContainer)ItemContainer.itemContainers.get((long)var0);
 		if (var2 == null) {
 			return 0;
-		} else if (var1 == -1) {
-			return 0;
-		} else {
-			int var3 = 0;
-
-			for (int var4 = 0; var4 < var2.quantities.length; ++var4) {
-				if (var2.ids[var4] == var1) {
-					var3 += var2.quantities[var4];
-				}
-			}
-
-			return var3;
 		}
+		if (var1 == -1) {
+			return 0;
+		}
+		int var3 = 0;
+
+		for (int var4 = 0; var4 < var2.quantities.length; ++var4) {
+			if (var2.ids[var4] == var1) {
+				var3 += var2.quantities[var4];
+			}
+		}
+
+		return var3;
 	}
 }