BUILD: fix cuda configure

[ikryukov]

What

fixed m4 config syntaxis

Why ?

followup after latest commit

[greptile-apps]

Greptile Summary

Fixed broken AS_IF macro syntax in CUDA configure script by properly nesting the conditional statements and adding proper variable quoting ("x$variable" instead of bare $variable).

• Corrected nested AS_IF structure for checking nvml_happy condition
• Added "x" prefix to variable comparisons following m4 best practices and codebase conventions
• Ensures proper error message display when TL CUDA is disabled

Confidence Score: 5/5

• This PR is safe to merge with no risk
• The changes fix a clear syntax error in m4 macro configuration. The fix follows established patterns in the codebase (proper variable quoting and nested AS_IF structure), and only affects build-time configuration logic with no runtime impact.
• No files require special attention

Important Files Changed

Filename	Overview
src/components/tl/cuda/configure.m4	Fixed nested AS_IF syntax and added proper variable quoting in test conditions

[Sergei-Lebedev]

/build