Fixed thinkfan writing out garbage to fan control

For some reason on the line that I changed, `cur_lvl == "V"`. Not sure
why this is the case. This causes invalid argument to be thrown by the
kernel, which crashes thinkfan.

Also fixed the build process with CMake, which seems to be broken.

CMakeLists.txt

@@ -6,7 +6,7 @@ option(USE_ATASMART "Enable reading temperatures from HDDs via S.M.A.R.T")
 set(MAXERR 2 CACHE STRING "Fail after this many consecutive errors when in DANGEROUS
 mode")
 
-add_executable(thinkfan thinkfan.c config.c message.c parser.c system.c)
+add_executable(thinkfan src/thinkfan.c src/config.c src/message.c src/parser.c src/system.c)
 
 set(CMAKE_C_FLAGS_DEBUG "-O0 -g3 -Wall -DDEBUG")
 

src/thinkfan.c

@@ -156,7 +156,7 @@ int fancontrol() {
 		// Write current fan level to IBM_FAN one cycle before the watchdog
 		// timeout ends, to let it know we're alive.
 		if (unlikely((wt -= tmp_sleeptime) <= sleeptime)) {
-			config->setfan();
+			set_fan;
 			wt = watchdog_timeout;
 		}