Fixing problem in mag spectrum, return values were missing

include/ITAThirdOctaveMagnitudeSpectrum.h

@@ -99,6 +99,8 @@ public:
 			if( m_vfValues[ n ] != 1.0f )
 				return false;
 		}
+
+		return true;
 	};
 
 	inline bool IsZero() const
@@ -108,6 +110,8 @@ public:
 			if( m_vfValues[ n ] != 0.0f )
 				return false;
 		}
+
+		return true;
 	};
 };