Corrected mistake in the periodic boundary test that prevented compilation...

Corrected mistake in the periodic boundary test that prevented compilation when optimisations are switched off.

configure.ac

@@ -868,7 +868,9 @@ touch src/version.c
 AC_OUTPUT
 
 # Report general configuration.
-AC_MSG_RESULT([
+AC_MSG_RESULT([ 
+ ------- Summary --------
+   
    Compiler        : $CC
     - vendor       : $ax_cv_c_compiler_vendor
     - version      : $ax_cv_c_compiler_version
@@ -899,4 +901,5 @@ AC_MSG_RESULT([
    Task debugging    : $enable_task_debugging
    Debugging checks  : $enable_debugging_checks
    Gravity checks    : $gravity_force_checks
-])
+
+ ------------------------])

tests/testPeriodicBC.c

@@ -45,7 +45,7 @@
 #endif
 
 #ifndef DOPAIR1
-#define DOPAIR1 runner_dopair1_density
+#define DOPAIR1 runner_dopair1_branch_density
 #define DOPAIR1_NAME "runner_dopair1_density"
 #endif
 

tests/tolerance_periodic_BC_normal.dat

 #   ID      pos_x      pos_y      pos_z        v_x        v_y        v_z           rho        rho_dh        wcount     wcount_dh         div_v       curl_vx       curl_vy       curl_vz
-    0	    1e-6       1e-6	  1e-6 	       1e-6 	  1e-6	     1e-6	   3e-6	      4e-5	    2e-4       3e-3		 2e-4	     1e-4	   1e-4		 1e-4
-    0	    1e-6       1e-6	  1e-6 	       1e-6 	  1e-6	     1e-6	   2e-6	      1.2e-4	    1e-4       1e-4		 2e-4	     5e-4	   5e-4	 	 5e-4
+    0	    1e-6       1e-6	  1e-6 	       1e-6 	  1e-6	     1e-6	   4e-6	      4e-5	    2e-4       3e-3		 2e-4	     1e-4	   1e-4		 1e-4
+    0	    1e-6       1e-6	  1e-6 	       1e-6 	  1e-6	     1e-6	   2e-6	      1.2e-4	    1e-4       1e-4		 3e-4	     5e-4	   5e-4	 	 5e-4
     0	    1e-6       1e-6	  1e-6 	       1e-6 	  1e-6	     1e-6	   1e-6	      1e-4	    1e-6       1e-4		 1e-4	     1e-4	   1e-4	 	 1e-4