fix phase range in half-cycle proposal

Fix small bug in the phase range in the half-cycle proposal. Old version would result in phases outside the [0,2 pi] range

src/BayesWaveMCMC.c

@@ -2209,7 +2209,7 @@ void EvolveIntrinsicParameters(struct Data *data, struct Prior *prior, struct Mo
               wave_y[1]->intParams[ii][4] = wave_x[1]->intParams[ii][4] + (wave_y[0]->intParams[ii][4]-wave_x[0]->intParams[ii][4]);
 
               while(wave_y[1]->intParams[ii][4] > LAL_TWOPI) wave_y[1]->intParams[ii][4] -=LAL_TWOPI;
-              while(wave_y[1]->intParams[ii][4] < LAL_TWOPI) wave_y[1]->intParams[ii][4] +=LAL_TWOPI;
+              while(wave_y[1]->intParams[ii][4] < 0.0) wave_y[1]->intParams[ii][4] +=LAL_TWOPI;
               
               constrain_hplus_hcross(wave_y, ii);
             }