Clang-Format: Allow empty functions to be single-line

For example

```
OIIOOutputDriver::~OIIOOutputDriver()
{
}
```

becomes

```
OIIOOutputDriver::~OIIOOutputDriver() {}
```

Saves quite some vertical space, which is especially handy for
constructors.

Pull Request: https://projects.blender.org/blender/blender/pulls/105594

intern/dualcon/intern/MemoryAllocator.h

@@ -20,9 +20,7 @@
  */
 class VirtualMemoryAllocator {
  public:
-  virtual ~VirtualMemoryAllocator()
-  {
-  }
+  virtual ~VirtualMemoryAllocator() {}
 
   virtual void *allocate() = 0;
   virtual void deallocate(void *obj) = 0;

intern/dualcon/intern/Projections.h

@@ -75,9 +75,7 @@ class CubeTriangleIsect {
   CubeProjection cubeProj[NUM_AXES];
 
  public:
-  CubeTriangleIsect()
-  {
-  }
+  CubeTriangleIsect() {}
 
   /**
    * Construction from a cube (axes aligned) and triangle

intern/dualcon/intern/dualcon_c_api.cpp

@@ -131,9 +131,7 @@ class DualConInputReader : public ModelReader {
   }
 
   /* stubs */
-  void printInfo()
-  {
-  }
+  void printInfo() {}
   int getMemory()
   {
     return sizeof(DualConInputReader);