Catch dimensionally mixed WKB collections

[pramsey]

If someone submits dimensionally mixed WKB collections, it will be read into LWGEOM objects and then the dimensionality bits may be set from above into the wrong values. This could result in a 2d subobject being read as 3d, with a nasty result. The WKB reader needs to die if handed dimensionally mixed WKB collections.

[strk]

Is this still an issue ? Doesn't seem so:

=> select '010700004002000000010100000000000000000000000000000000000000010100000000000000000000000000000000000000'::geometry;                              
 ERROR:  Dimensions mismatch in lwcollection

[strk]

I'll assume this is fixed. Please reopen with an example WKB if this is not the case. Note that 1.5 is likely to be still affected in taht it raises a NOTICE but continues.