add glTexParameteri() and fix glTexParameteriv()
diff --git a/include/private/opengles/gl_context.h b/include/private/opengles/gl_context.h
index 0c7ad46..a85f275 100644
--- a/include/private/opengles/gl_context.h
+++ b/include/private/opengles/gl_context.h
@@ -456,7 +456,7 @@
     void validate();
     matrixf_t& top() { return stack[depth]; }
     const matrixf_t& top() const { return stack[depth]; }
-    const uint32_t top_ops() const { return ops[depth]; }
+    uint32_t top_ops() const { return ops[depth]; }
     inline bool isRigidBody() const {
         return !(ops[depth] & ~(OP_TRANSLATE|OP_UNIFORM_SCALE|OP_ROTATE));
     }