error: conflicting declaration 'typedef struct real_pcre8_or_16 pcre'

I'm currently getting this error with 1.6.62 on both Fedora 28 and Rawhide. Could be GCC 8 being more picky?

```
BUILDSTDERR: In file included from /builddir/build/BUILD/OpenCOLLADA-1.6.62/COLLADABaseUtils/src/COLLADABUURI.cpp:18:
BUILDSTDERR: /usr/include/pcre.h:325:33: error: conflicting declaration 'typedef struct real_pcre8_or_16 pcre'
BUILDSTDERR: typedef struct real_pcre8_or_16 pcre;
BUILDSTDERR: ^~~~
BUILDSTDERR: In file included from /builddir/build/BUILD/OpenCOLLADA-1.6.62/COLLADABaseUtils/src/COLLADABUURI.cpp:14:
BUILDSTDERR: /builddir/build/BUILD/OpenCOLLADA-1.6.62/COLLADABaseUtils/include/COLLADABUPcreCompiledPattern.h:17:26: note: previous declaration as 'typedef struct real_pcre pcre'
BUILDSTDERR: typedef struct real_pcre pcre;
BUILDSTDERR: ^~~~
```

Start with COLLADABaseUtils/include/COLLADABUPcreCompiledPattern.h and compare its pcre typedef with the declaration in /usr/include/pcre.h. Reproduce the OpenCOLLADA 1.6.62 build on an affected Fedora system and determine the compatible declaration or include arrangement. Done means COLLADABUURI.cpp compiles without the conflicting declaration error.

Written by the indexing model from the issue text.