Read the entropy flag as an array of 6 values

Fix to #192 (closed).

Here is the fix.

src/parallel_io.c

@@ -410,7 +410,9 @@ void read_ic_parallel(char* fileName, const struct UnitSystem* internal_units,
   if (h_grp < 0) error("Error while opening file header\n");
 
   /* Read the relevant information and print status */
-  readAttribute(h_grp, "Flag_Entropy_ICs", INT, flag_entropy);
+  int flag_entropy_temp[6];
+  readAttribute(h_grp, "Flag_Entropy_ICs", INT, flag_entropy_temp);
+  *flag_entropy = flag_entropy_temp[0];
   readAttribute(h_grp, "BoxSize", DOUBLE, boxSize);
   readAttribute(h_grp, "NumPart_Total", UINT, numParticles);
   readAttribute(h_grp, "NumPart_Total_HighWord", UINT, numParticles_highWord);