suggestion: use valgrind to detect memory-related issues

[srele96]

I saw this 6db81c9 commit and thought maybe caps-log could benefit from Valgrind profiling.

From the Valgrind documentation:

Introduction

The Valgrind tool suite provides a number of debugging and profiling tools that help you make your programs faster and more correct. The most popular of these tools is called Memcheck. It can detect many memory-related errors that are common in C and C++ programs and that can lead to crashes and unpredictable behaviour.

The rest of this guide gives the minimum information you need to start detecting memory errors in your program with Memcheck. For full documentation of Memcheck and the other tools, please read the User Manual.

https://valgrind.org/