Fixed some Doxygen warnings in AudioBlock and SIMDRegister

modules/juce_dsp/containers/juce_AudioBlock.h

@@ -265,7 +265,7 @@ public:
 
         All indices and sizes are in the receiver's units, i.e. if SampleType is a
         SIMDRegister then incrementing srcPos by one will increase the sample position
-        in the AudioBuffer's units by a factor of SIMDRegister::\<SampleType\>::SIMDNumElements.
+        in the AudioBuffer's units by a factor of SIMDRegister<SampleType>::SIMDNumElements.
     */
     forcedinline AudioBlock& copyFrom (const AudioBuffer<NumericType>& src, size_t srcPos = 0, size_t dstPos = 0,
                                        size_t numElements = std::numeric_limits<size_t>::max())
@@ -287,7 +287,7 @@ public:
 
         All indices and sizes are in the receiver's units, i.e. if SampleType is a
         SIMDRegister then incrementing dstPos by one will increase the sample position
-        in the AudioBuffer's units by a factor of SIMDRegister::\<SampleType\>::SIMDNumElements.
+        in the AudioBuffer's units by a factor of SIMDRegister<SampleType>::SIMDNumElements.
     */
     forcedinline const AudioBlock& copyTo (AudioBuffer<NumericType>& dst, size_t srcPos = 0, size_t dstPos = 0,
                                            size_t numElements = std::numeric_limits<size_t>::max()) const

modules/juce_dsp/containers/juce_SIMDRegister_Impl.h

@@ -45,6 +45,7 @@ private:
     size_t idx;
 };
 
+#ifndef DOXYGEN
 //==============================================================================
 /* This class is used internally by SIMDRegister to abstract away differences
    in operations which are different for complex and pure floating point types. */
@@ -157,6 +158,7 @@ struct CmplxSIMDOps<std::complex<Scalar>>
         return SIMDNativeOps<Scalar>::add (a, SIMDNativeOps<Scalar>::cmplxmul (b, c));
     }
 };
+#endif
 
 //==============================================================================
  namespace util