CMakeLists.txt: improve searching for hidapi

Debian-based distributions don't include the CMake module.

CMakeLists.txt

@@ -41,13 +41,16 @@ pkg_check_modules (libusb libusb-1.0)
 
 # On MSYS2, the CMake package cannot link statically, but pkg-config can.
 # On macOS, we explicitly want to use the CMake package.
-if (WIN32)
+if (NOT WIN32)
+	find_package (hidapi QUIET)
+	if (hidapi_FOUND)
+		set (hidapi_INCLUDE_DIRS)
+		set (hidapi_LIBRARY_DIRS)
+		set (hidapi_LIBRARIES hidapi::hidapi)
+	endif ()
+endif ()
+if (NOT hidapi_FOUND)
 	pkg_search_module (hidapi hidapi hidapi-hidraw hidapi-libusb)
-else ()
-	find_package (hidapi)
-	set (hidapi_INCLUDE_DIRS)
-	set (hidapi_LIBRARY_DIRS)
-	set (hidapi_LIBRARIES hidapi::hidapi)
 endif ()
 
 option (WITH_LIBUSB "Compile with libusb-based utilities" ${libusb_FOUND})

eizoctl.c

@@ -1251,10 +1251,13 @@ message_printf(const char *format, va_list ap)
 		return NULL;
 	mbstowcs(format_wide, format, format_wide_len);
 
-	int message_len = vswprintf(NULL, 0, format_wide, ap) + 1;
+	// Note that just vswprintf() cannot be used like this
+	// (at least since mingw-w64 commit c85d64),
+	// and vsnwprintf() is a MinGW extension, acting like C11 vsnwprintf_s.
+	int message_len = vsnwprintf(NULL, 0, format_wide, ap) + 1;
 	wchar_t *message = calloc(message_len, sizeof *message);
 	if (message_len > 0 && message)
-		vswprintf(message, message_len, format_wide, ap);
+		vsnwprintf(message, message_len, format_wide, ap);
 
 	free(format_wide);
 	return message;