Fix parsing string as sizes (e.g. 3x4)

src/blc_array.cpp

@@ -218,7 +218,7 @@ int blc_array::sscan_dims(char const *string){
     size=get_type_size();
     
     SSCANF(1, string, "%d%n", &length, &pos);
-    total_pos=pos;
+    total_pos=0;
     dims_nb=0;
     if (dims) FREE(dims);
     if (length != 0){