enforce C locale, so that numbers are created and parsed correctly in the GUI text editor

cmake/packaging/linux_wrapper.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 # wrapper for bundled executables
 
+# reset locale to avoid problems with decimal numbers
+export LC_ALL=C
+
 BASEDIR=$(dirname "$0")
 EXENAME=$(basename "$0")