Fix return warning (#160)

Author: cbrnr

src/signal_processing/SPUC/complex.h

@@ -37,9 +37,8 @@ template <class T> class complex
     re = 0;
     im = 0;
   }
-  void*  operator new (size_t) {
-	  T* re = new T;
-	  T* im = new T;
+  void* operator new(size_t size) {
+      return ::operator new(size);
   }
   complex(T r, T i) :re(r), im(i) {}
   complex(T r) : re(r), im(0) {}