fix occasional crash on mac editor (apply the fix to ios too)

engine/src/shell/platform/unity/darwin/ios/unity_surface_manager.mm

 bool UnitySurfaceManager::ReleaseNativeRenderTexture()
 {
   //release gl resources
+  CFRelease(gl_tex_ref_);
+  CFRelease(gl_tex_cache_ref_);
+
+  //release metal resources
+  CFRelease(metal_tex_ref_);
+  CFRelease(metal_tex_cache_ref_);
+
+  //release cv pixelbuffer
+  CVPixelBufferRelease(pixelbuffer_ref);
+
-  FML_DCHECK(gl_tex_ != 0);
-  glDeleteTextures(1, &gl_tex_);
+  //gl_tex_ is released in CVOpenGLTextureRelease
-
-  CFRelease(gl_tex_cache_ref_);
-
-  CFRelease(gl_tex_ref_);
-  //release metal resources
+  metal_tex_ref_ = nullptr;
+  metal_tex_cache_ref_ = nullptr;
-
-  CFRelease(metal_tex_ref_);
-  metal_tex_ref_ = nullptr;
-
-  CFRelease(metal_tex_cache_ref_);
-  metal_tex_cache_ref_ = nullptr;
-
-  //release cv pixelbuffer
-  CVPixelBufferRelease(pixelbuffer_ref);
+  
-
   return true;
 }
 }  // namespace uiwidgets

engine/src/shell/platform/unity/darwin/macos/unity_surface_manager.mm

 bool UnitySurfaceManager::ReleaseNativeRenderTexture()
 {
   //release gl resources
+  CVOpenGLTextureRelease(gl_tex_ref_);
+  CVOpenGLTextureCacheRelease(gl_tex_cache_ref_);
+
+  //release metal resources
+  CFRelease(metal_tex_ref_);
+  CFRelease(metal_tex_cache_ref_);
+
+  //release pixel buffer
+  CVPixelBufferRelease(pixelbuffer_ref);
+
-
-  FML_DCHECK(gl_tex_ != 0);
-  //gl_tex_ will be released in CVOpenGLTextureRelease
-  //glDeleteTextures(1, &gl_tex_);
+  
+  //gl_tex_ is released in CVOpenGLTextureRelease
-
-  CVOpenGLTextureCacheRelease(gl_tex_cache_ref_);
-
-  CVOpenGLTextureRelease(gl_tex_ref_);
-  //release metal resources
-  //since ARC is enabled by default, no need to release the texture
-  metal_tex_ = nullptr;
-
-  CFRelease(metal_tex_ref_);
-
-  CFRelease(metal_tex_cache_ref_);
+  //since ARC is enabled by default, no need to release the texture
+  metal_tex_ = nullptr;
-  //release cv pixelbuffer
-  CVPixelBufferRelease(pixelbuffer_ref);
-
   return true;
 }
 }  // namespace uiwidgets