Do not use deprecated Octave functions

https://github.com/OPM/ResInsight/commit/b5ad0b9170f14b1c0f90c9e9292c93fabc744e35
p4#: 21106

OctavePlugin/riGetActiveCellInfo.cpp

@@ -52,7 +52,7 @@ void getActiveCellInfo(int32NDArray& activeCellInfo, const QString &hostName, qu
 
     activeCellCount = byteCount / sizeof(qint32);
 
-    dim_vector dv (2);
+    dim_vector dv (2, 1);
     dv(0) = activeCellCount;
     dv(1) = timestepCount;
     activeCellInfo.resize(dv);

OctavePlugin/riGetMainGridDimensions.cpp

@@ -51,7 +51,7 @@ void getMainGridDimensions(int32NDArray& gridDimensions, const QString &hostName
     socketStream >> jCount;
     socketStream >> kCount;
 
-    dim_vector dv (1);
+    dim_vector dv (1, 1);
     dv(0) = 3;
 
     gridDimensions.resize(dv);