Fix passing too many arguments to "init_test_strategies".

[fancycode]

This fixes an issue when compiling with gcc-15:

gcc -DHAVE_CONFIG_H -I. -I..   -DKVZ_DLL_EXPORTS -Wdate-time -D_FORTIFY_SOURCE=2  -I. -I.. -I../src -pthread -Wall -Wextra -Wvla -Wno-sign-compare -Wno-unused-parameter -I./src -I./src/extras -ftree-vectorize -fvisibility=hidden -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/kvazaar-2.3.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -c -o kvazaar_tests-tests_main.o `test -f 'tests_main.c' || echo './'`tests_main.c
tests_main.c: In function ‘main’:
tests_main.c:54:3: error: too many arguments to function ‘init_test_strategies’; expected 0, have 1
   54 |   init_test_strategies(1);
      |   ^~~~~~~~~~~~~~~~~~~~ ~
In file included from tests_main.c:35:
test_strategies.h:40:6: note: declared here
   40 | void init_test_strategies();
      |      ^~~~~~~~~~~~~~~~~~~~

See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1097138

[fador]

Thanks for the fix!