Update qinstall.sh: store_config(): Change for more efficency, and no…

[luca1234567a]

store_config(): Change for more efficency, and not necessary operation. Change order of if.
Prevent non necessary execution of current_md5sum=$($CMD_MD5SUM "$file" 2>/dev/null | $CMD_CUT -d' ' -f1) if $file non exist.
Place first if [ -z "$orig_md5sum" ]; then because if $orig_md5sum is empty the if [ "$orig_md5sum" = "$current_md5sum" ] || [ "$new_md5sum" = "$current_md5sum" ]; then allways was false.

[edhongcy]

Thanks for working on this. I think the intent makes sense, but I would not merge this version as-is for two reasons:

• This is no longer only an efficiency change. Reordering the conditions changes behavior in store_config(). In the old flow, if the current file already matched orig_md5sum or new_md5sum, the script would keep using the new file path without moving it aside. After this change, when orig_md5sum is empty and the file exists, the code now enters the -z "$orig_md5sum" branch first and moves the file to ${file}.qdkorig, even in cases where the current file already matches the new package content. That looks like a functional change, not just an optimization.

• git diff --check also reports a whitespace issue on the new elif line (space before tab in indent).

Suggested direction:

• Keep the optimization of avoiding md5sum when the file does not exist.
• But preserve the original decision order for existing files, so the current_md5sum comparison still happens before the -z "$orig_md5sum" backup path.
• Please also fix the whitespace issue before merge.

So from my side, this PR needs one more revision before it is safe to merge.