Survive _goodbuffers test in SparseMatrixCSC constructor

for Julia >=1.7

Author: j-fu

Project.toml

@@ -1,7 +1,7 @@
 name = "ExtendableSparse"
 uuid = "95c220a8-a1cf-11e9-0c77-dbfce5f500b3"
 authors = ["Juergen Fuhrmann <juergen.fuhrmann@wias-berlin.de>"]
-version = "0.6.3"
+version = "0.6.4"
 
 [deps]
 DocStringExtensions = "ffbed154-4ef7-542d-bbb7-c09d3a79fcae"

src/sparsematrixlnk.jl

@@ -310,6 +310,8 @@ function Base.:+(lnk::SparseMatrixLNK{Tv,Ti},csc::SparseMatrixCSC)::SparseMatrix
     @assert(csc.m==lnk.m)
     @assert(csc.n==lnk.n)
 
+    # overallocate arrays in order to avoid
+    # presumably slower push!
     xnnz=nnz(csc)+nnz(lnk)
     colptr=Vector{Ti}(undef,csc.n+1)
     rowval=Vector{Ti}(undef,xnnz)
@@ -389,6 +391,9 @@ function Base.:+(lnk::SparseMatrixLNK{Tv,Ti},csc::SparseMatrixCSC)::SparseMatrix
         end
     end
     colptr[csc.n+1]=inz
+    # Julia 1.7 wants this correct
+    resize!(rowval,inz-1)
+    resize!(nzval,inz-1)
     SparseMatrixCSC{Tv,Ti}(csc.m,csc.n,colptr,rowval,nzval)
 end