fix valgrind warning on font #1514

Job	Run time
code formatting check	38s
cppcheck	3m 14s
min features with gcc	2m 56s
min features with g++	2m 5s
min features with clang	3m 23s
max features with gcc	3m 26s
max features with g++	2m 44s
max features with clang	3m 36s
max features with gcc and DEBUG	2m 54s
max features with gcc for 32-bit arch (legacy OS)	2m 40s
max features with g++ for 32-bit arch (legacy OS)	1m 54s
max features with clang for 32-bit arch (legacy OS)	1m 59s
	31m 29s

Provide feedback