Allow compilation on older MacOS/Compiler - Autorelease pools
The attached patches allow compiling GIMP 2.10.8 on older MacOS versions (tested on 10.5 Leopard) by using older code style for instantiating autorelease pools.
Tested and working (working executable obtained)gimp_web-browser_c.patch, I am separating the different patches for topic gimp_gimp_gimpcriticaldialog_c.patch