Include fftw3.h from math/fftw3. LIBFFTW3_INCLUDE_DIR is set in the port
Makefile.

--- src/fingerprint/CMakeLists.txt.orig	2024-11-24 17:34:23 UTC
+++ src/fingerprint/CMakeLists.txt
@@ -1,3 +1,4 @@
+include_directories(${LIBFFTW3_INCLUDE_DIR})
 include_directories(${CMAKE_CURRENT_LIST_DIR}/..)
 include_directories(${CMAKE_CURRENT_BINARY_DIR}/..)