Clean up includes a bit

Trying out the IWYU tool to only include what's necessary in a given file.
Seems to work decently (it'll miss some headers, suggest unnecessary ones, and
make nonsense suggestions for some things, but overall gives a good starting
point), and helps clean out some headers.

1 files changed, 21 insertions, 14 deletions

diff --git a/Alc/hrtf.cpp b/Alc/hrtf.cpp
index d86c4ecf..5561ebfd 100644
--- a/Alc/hrtf.cpp
+++ b/Alc/hrtf.cpp
@@ -20,30 +20,37 @@
 
 #include "config.h"
 
-#include <stdlib.h>
-#include <ctype.h>
+#include "hrtf.h"
 
-#include <mutex>
+#include <algorithm>
 #include <array>
-#include <vector>
+#include <cassert>
+#include <cctype>
+#include <cstdint>
+#include <cstdio>
+#include <cstring>
+#include <functional>
+#include <fstream>
+#include <iterator>
 #include <memory>
-#include <istream>
+#include <mutex>
+#include <new>
 #include <numeric>
-#include <algorithm>
-#include <functional>
+#include <utility>
 
 #include "AL/al.h"
-#include "AL/alc.h"
+
 #include "alMain.h"
-#include "alSource.h"
-#include "alu.h"
-#include "hrtf.h"
 #include "alconfig.h"
-#include "filters/splitter.h"
-
-#include "compat.h"
 #include "almalloc.h"
+#include "alnumeric.h"
+#include "aloptional.h"
 #include "alspan.h"
+#include "compat.h"
+#include "filters/splitter.h"
+#include "logging.h"
+#include "math_defs.h"
+#include "opthelpers.h"
 
 
 struct HrtfHandle {