Fixed missing cmath header in recent compilers

psrdada_cpp/effelsberg/edd/src/EDDPolnMerge.cpp

@@ -3,6 +3,8 @@
 #include <immintrin.h>
 #include <time.h>
 #include <iomanip>
+#include <cmath>
+
 namespace psrdada_cpp {
 namespace effelsberg {
 namespace edd {
@@ -51,7 +53,7 @@ namespace edd {
 	std::time_t unix_time_int;
 	struct std::tm * timeinfo;
 	double fractpart, intpart;
-	fractpart = modf (static_cast<double>(unix_time) , &intpart);
+	fractpart = std::modf (static_cast<double>(unix_time) , &intpart);
 	unix_time_int = static_cast<std::time_t>(intpart);
 	timeinfo = std::gmtime (&unix_time_int);
 	std::strftime(time_buffer, 80, "%Y-%m-%d-%H:%M:%S", timeinfo);

psrdada_cpp/effelsberg/edd/src/EDDRoach.cpp

@@ -3,6 +3,8 @@
 #include <immintrin.h>
 #include <time.h>
 #include <iomanip>
+#include <cmath>
+
 namespace psrdada_cpp {
 namespace effelsberg {
 namespace edd {
@@ -51,7 +53,7 @@ namespace edd {
 	std::time_t unix_time_int;
 	struct std::tm * timeinfo;
 	double fractpart, intpart;
-	fractpart = modf (static_cast<double>(unix_time) , &intpart);
+	fractpart = std::modf (static_cast<double>(unix_time) , &intpart);
 	unix_time_int = static_cast<std::time_t>(intpart);
 	timeinfo = std::gmtime (&unix_time_int);
 	std::strftime(time_buffer, 80, "%Y-%m-%d-%H:%M:%S", timeinfo);

psrdada_cpp/effelsberg/edd/src/EDDRoach_merge.cpp

@@ -3,6 +3,8 @@
 #include <immintrin.h>
 #include <time.h>
 #include <iomanip>
+#include <cmath>
+
 namespace psrdada_cpp {
 namespace effelsberg {
 namespace edd {
@@ -51,7 +53,7 @@ namespace edd {
 	std::time_t unix_time_int;
 	struct std::tm * timeinfo;
 	double fractpart, intpart;
-	fractpart = modf (static_cast<double>(unix_time) , &intpart);
+	fractpart = std::modf (static_cast<double>(unix_time) , &intpart);
 	unix_time_int = static_cast<std::time_t>(intpart);
 	timeinfo = std::gmtime (&unix_time_int);
 	std::strftime(time_buffer, 80, "%Y-%m-%d-%H:%M:%S", timeinfo);