fix: <algorithm> should be included for usage of std::min/std::max

- adds the include of <algorithm> in source files which use
  std::min/std::max functions.

Change-Id: I873954f40492ffdec9249e71c585a38dddc9d86f
Tuleap: #790

src/media/audio/audiobuffer.cpp

@@ -22,6 +22,7 @@
 #include "logger.h"
 #include <string.h>
 #include <cstring> // memset
+#include <algorithm>
 
 namespace ring {
 

src/media/audio/ringbuffer.cpp

@@ -30,6 +30,7 @@
 #include <utility> // for std::pair
 #include <cstdlib>
 #include <cstring>
+#include <algorithm>
 
 namespace ring {
 

src/media/audio/ringbufferpool.cpp

@@ -27,7 +27,7 @@
 #include <limits>
 #include <utility> // for std::pair
 #include <cstring>
-#include <algorithm> // for std::min
+#include <algorithm>
 
 namespace ring {