Merge origin/dev (readback overhaul c6d22e6e) into default-texture-objects - true per-target default texture objects supersede the readback branch texture-0 silent no-ops: removed the null-slot early-outs in TexImage1D/2D/3D(Multisample) and TexBuffer plus the DefaultTextureOperationsAreSilentNoOps test so name-0 operations actually (re)specify the default objects; deduped the shared state-reset fixes, keeping upstream std::clamp for GL_MAX_UNIFORM_BUFFER_BINDINGS, the Int-typed ActiveTexture combined-units range check, renderbuffer name-0 unbind, and vertex-attrib-0 current-value writes with the attrib-0 round-trip test

MobileGL/MG_Impl/GLImpl/VertexArray/GL_VertexArray.cpp

@@ -82,7 +82,7 @@ namespace MobileGL::MG_Impl::GLImpl {
             // including index 0 - only an out-of-range index is an error (INVALID_VALUE).
             // "Attribute 0 is immutable" was legacy immediate-mode lore; rejecting it broke GL
             // CTS's per-case state reset, which writes vertexAttrib4f(0, 0,0,0,1) after every case.
-            (void)funcName;
+            static_cast<void>(funcName);
             return VertexArrayImpl::ValidateVertexAttributeIndex(index);
         }