Fix memory allocation/deallocation mismatch in fuzz_array.c

[OwenSanzas]

The fuzzer was using C's free() to deallocate memory allocated with C++'s new[] operator, causing an immediate crash when built with AddressSanitizer:

ERROR: AddressSanitizer: alloc-dealloc-mismatch (operator new [] vs free)

This prevents the fuzzer from running and testing CUPS array functionality.

Root cause:

• Memory allocated with new[] in fuzz_helpers.cpp (lines 21, 24)
• Memory freed with free() in fuzz_array.c (lines 161-162)
• C++ requires new[] to be paired with delete[], not free()

Fix:
Replace incorrect free() calls with the existing free_fuzz_array_data() helper function that properly uses delete[] operator.

This allows the fuzzer to run successfully and test CUPS code without immediate crashes.