refactor(renderer): reuse existing IntBuffer fields in queryShaderStorageBlockBinding

Use the renderer's intBuf1 and intBuf16 instance fields instead of
allocating new IntBuffers on each call.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: zzuegg

jme3-core/src/main/java/com/jme3/renderer/opengl/GLRenderer.java

@@ -1590,11 +1590,11 @@ private void resolveBufferBlockBindings(final Shader shader) {
      * @return the binding point assigned to the block.
      */
     private int queryShaderStorageBlockBinding(int program, int blockIndex) {
-        IntBuffer props = BufferUtils.createIntBuffer(1);
-        props.put(GL4.GL_BUFFER_BINDING).flip();
-        IntBuffer params = BufferUtils.createIntBuffer(1);
-        gl4.glGetProgramResourceiv(program, GL4.GL_SHADER_STORAGE_BLOCK, blockIndex, props, null, params);
-        return params.get(0);
+        intBuf16.clear();
+        intBuf16.put(GL4.GL_BUFFER_BINDING).flip();
+        intBuf1.clear();
+        gl4.glGetProgramResourceiv(program, GL4.GL_SHADER_STORAGE_BLOCK, blockIndex, intBuf16, null, intBuf1);
+        return intBuf1.get(0);
     }
 
     protected void updateShaderUniforms(Shader shader) {