# Fix for matmul_4bit out Parameter Issue

[ved1beta]

fix: matmul_4bit out parameter handling for 1D and 2D tensors

• Fix incorrect handling of out parameter in matmul_4bit for 1D tensors
• Improve shape validation in gemv_4bit.out to handle 1D tensor cases
• Ensure proper tensor reshaping and memory handling in CUDA kernels
• Update conditional logic in matmul_4bit to consistently handle OUT parameter

This fixes GitHub issue #1235 where the out parameter was not working correctly
for matrix multiplication operations, particularly with 1D input tensors.