v0.9.3: added casts to buffer methods to prevent JDK 9+ issues

SPD-classes/src/main/java/com/watabou/glwrap/Quad.java

@@ -23,6 +23,7 @@ package com.watabou.glwrap;
 
 import com.badlogic.gdx.Gdx;
 
+import java.nio.Buffer;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 import java.nio.FloatBuffer;

SPD-classes/src/main/java/com/watabou/glwrap/Texture.java

@@ -24,6 +24,7 @@ package com.watabou.glwrap;
 import com.badlogic.gdx.Gdx;
 import com.badlogic.gdx.graphics.Pixmap;
 
+import java.nio.Buffer;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 import java.nio.IntBuffer;
@@ -108,7 +109,7 @@ public class Texture {
 			order( ByteOrder.nativeOrder() ).
 			asIntBuffer();
 		imageBuffer.put( pixels );
-		imageBuffer.position( 0 );
+		((Buffer)imageBuffer).position( 0 );
 		
 		Gdx.gl.glTexImage2D(
 			Gdx.gl.GL_TEXTURE_2D,
@@ -130,7 +131,7 @@ public class Texture {
 			allocateDirect( w * h ).
 			order( ByteOrder.nativeOrder() );
 		imageBuffer.put( pixels );
-		imageBuffer.position( 0 );
+		((Buffer)imageBuffer).position( 0 );
 		
 		Gdx.gl.glPixelStorei( Gdx.gl.GL_UNPACK_ALIGNMENT, 1 );
 

SPD-classes/src/main/java/com/watabou/glwrap/Vertexbuffer.java

@@ -23,6 +23,7 @@ package com.watabou.glwrap;
 
 import com.badlogic.gdx.Gdx;
 
+import java.nio.Buffer;
 import java.nio.FloatBuffer;
 import java.util.ArrayList;
 
@@ -74,7 +75,7 @@ public class Vertexbuffer {
 	public void updateGLData(){
 		if (updateStart == -1) return;
 
-		vertices.position(updateStart);
+		((Buffer)vertices).position(updateStart);
 		bind();
 
 		if (updateStart == 0 && updateEnd == vertices.limit()){