Fix ambiguity

Author: gdalle

ext/SparseMatrixColoringsGPUArraysExt.jl

@@ -8,7 +8,18 @@ SMC.matrix_versions(A::AbstractGPUSparseMatrix) = (A,)
 
 ## Compression (slow, through CPU)
 
-function SMC.compress(A::AbstractGPUSparseMatrix, result::SMC.AbstractColoringResult)
+function SMC.compress(
+    A::AbstractGPUSparseMatrix, result::SMC.AbstractColoringResult{structure,:column}
+) where {structure}
+    A_cpu = SparseMatrixCSC(A)
+    B_cpu = SMC.compress(A_cpu, result)
+    B = dense_array_type(A)(B_cpu)
+    return B
+end
+
+function SMC.compress(
+    A::AbstractGPUSparseMatrix, result::SMC.AbstractColoringResult{structure,:row}
+) where {structure}
     A_cpu = SparseMatrixCSC(A)
     B_cpu = SMC.compress(A_cpu, result)
     B = dense_array_type(A)(B_cpu)