implementation of comments: codestyle and optimization of particleMas…

…s function

CHANGELOG.md

@@ -6,9 +6,9 @@
  * Fixed wrong mass inheritance for secondaries other than nuclei or electron/positron
 
 ### New features:
+ * Added new backwards-compatible function particleMass that returns particle mass also for non-nuclei 
 
 ### Interface changes:
- * Added new backwards-compatible function particleMass that returns particle mass also for non-nuclei 
 
 ### Features that are deprecated and will be removed after this release
  * EBL model from Finke et al. 2022

include/crpropa/ParticleMass.h

@@ -15,6 +15,7 @@ namespace crpropa {
  @returns The mass of a the particle
  */
  double particleMass(int id);
+
 /** Get the nucleus mass by lookup from a table.
  The masses are the atomic masses from the NIST database: 
    http://www.nist.gov/pml/data/comp.cfm
@@ -25,6 +26,7 @@ namespace crpropa {
  @returns The mass of a the nucleus
  */
 double nuclearMass(int id);
+
 /** Get the nucleus mass by lookup from a table.
  The masses are the atomic masses from the NIST database: 
    http://www.nist.gov/pml/data/comp.cfm

src/ParticleMass.cpp

@@ -54,14 +54,11 @@ struct NuclearMassTable {
 static NuclearMassTable nuclearMassTable;
 
 double particleMass(int id) {
-	double m;
 	if (isNucleus(id))
 		return nuclearMass(id);
 	if (abs(id) == 11)
-		m = mass_electron;
-	else
-		m = 0.0;
-	return m;
+		return mass_electron;
+	return 0.0;
 }
 
 double nuclearMass(int id) {