[ci skip] Change indexvector access

python/pystencils_walberla/templates/Boundary.tmpl.h

@@ -80,7 +80,7 @@ public:
         {% endif -%}
 
         CpuIndexVector & indexVector(Type t) { return cpuVectors_[t]; }
-        {{StructName}} * pointerCpu(Type t)  { return &(cpuVectors_[t][0]); }
+        {{StructName}} * pointerCpu(Type t)  { return cpuVectors_[t].data(); }
 
         {% if target == 'gpu' -%}
         {{StructName}} * pointerGpu(Type t)  { return gpuVectors_[t]; }