Blender Git Loki

Cleanup: silence [-Wmissing-braces] warning.

Introduced in {rBd6525e8d133b787655bdb2c2fcef218591a457c3}

Compiler: Apple LLVM version 10.0.1 (clang-1001.0.46.4)
Target: x86_64-apple-darwin18.7.0
Thread model: posix
```
source/blender/draw/engines/image/image_shader.c:46:13: warning:
suggest braces around initialization of subobject [-Wmissing-braces]
} e_data = {0}; /* Engine data */
^
{}
1 warning generated.
```

Reviewed By: jbakker

Differential Revision: https://developer.blender.org/D8873