Update src/layers/conv.jl

Co-authored-by: Carlo Lucibello <[email protected]>

Author: itsmohitanand

src/layers/conv.jl

@@ -1162,7 +1162,7 @@ function (l::GMMConv)(g::GNNGraph, x::AbstractMatrix, e::AbstractMatrix)
 
     if l.residual
         if size(x,1)==size(m,1)
-            m+=x
+            m += x
         else
             @warn "Residual not applied : output feature $(size(m,1)) !== input_feature $(size(x,1))"
         end