Compat: Check for successful GLEW initialisation fails on my PC / Trixie

I observed same strange behaviour already last year on my »Video Output« talk.
The return value indicates an unkown error, but the subsequent usage seemingly works...

On my Laptop, I don not see this error; it might be due to the very old graphics card on my PC...

FrOSCon26/examples/README

@@ -5,12 +5,15 @@ IO_URING and Video Output Example Code
 :date: 8/2026
 
 
-This directory contains example code to demonstrate reading data blocks
+This directory contains a example code to demonstrate reading data blocks
 continuously using the io_uring kernel interface. The loaded data is then
 fed to a video display pipeline based on OpenGL / EGL
 
+[red yellow-background]#Publish on Lumiera.org#
+////
 TIP: This demo code has been published on
-     link:https://www.lumiera.org/research/ioUring/index.html[Lumiera.org]
+     link:https://lumiera.org/research/videoDisplay/index.html[Lumiera.org]
+////
 
 
 Building the code
@@ -36,9 +39,9 @@ TIP: The `-j4` option tells make to use 4 cores concurrently to speed up the bui
 Use at least GCC-14
 ~~~~~~~~~~~~~~~~~~~
 [red yellow-background]#TODO: still relevant?#
-Some older C++ compilers seem to have problems with `constexpr` functions;
-to circumvent such problems, you might want to use at least GCC-14,
-which can be configured for CMake with
+Some older C++ compilers seem to have problems with a `constexpr` function used in 'commons.hpp'.
+Either comment out the line with the static assertion, or use at least GCC-14, which can be
+configured for CMake with
 
 -----
 cmake -S examples -B build -DCMAKE_CXX_COMPILER=g++-14