Only give warning for 'bad' MinGW compiler when no SSE option given. So that user does not receive the same warning subsequently after taking action to set the URHO3D_SSE option explicitly or after the correct setting has been set by the script.
Only give warning for 'bad' MinGW compiler when no SSE option given.
So that user does not receive the same warning subsequently after taking action to set the URHO3D_SSE option explicitly or after the correct setting has been set by the script.

victorholt/Urho3D,SuperWangKai/Urho3D,carnalis/Urho3D,carnalis/Urho3D,rokups/Urho3D,urho3d/Urho3D,tommy3/Urho3D,299299/Urho3D,abdllhbyrktr/Urho3D,fire/Urho3D-1,abdllhbyrktr/Urho3D,MeshGeometry/Urho3D,rokups/Urho3D,henu/Urho3D,luveti/Urho3D,luveti/Urho3D,MeshGeometry/Urho3D,eugeneko/Urho3D,orefkov/Urho3D,helingping/Urho3D,helingping/Urho3D,helingping/Urho3D,MeshGeometry/Urho3D,urho3d/Urho3D,weitjong/Urho3D,abdllhbyrktr/Urho3D,luveti/Urho3D,carnalis/Urho3D,henu/Urho3D,codemon66/Urho3D,eugeneko/Urho3D,xiliu98/Urho3D,iainmerrick/Urho3D,orefkov/Urho3D,MeshGeometry/Urho3D,kostik1337/Urho3D,eugeneko/Urho3D,abdllhbyrktr/Urho3D,SirNate0/Urho3D,cosmy1/Urho3D,henu/Urho3D,iainmerrick/Urho3D,codemon66/Urho3D,xiliu98/Urho3D,codedash64/Urho3D,299299/Urho3D,bacsmar/Urho3D,helingping/Urho3D,codemon66/Urho3D,tommy3/Urho3D,SuperWangKai/Urho3D,codedash64/Urho3D,urho3d/Urho3D,MeshGeometry/Urho3D,SirNate0/Urho3D,weitjong/Urho3D,rokups/Urho3D,bacsmar/Urho3D,PredatorMF/Urho3D,fire/Urho3D-1,codemon66/Urho3D,MonkeyFirst/Urho3D,xiliu98/Urho3D,tommy3/Urho3D,SirNate0/Urho3D,SirNate0/Urho3D,bacsmar/Urho3D,SuperWangKai/Urho3D,tommy3/Urho3D,MonkeyFirst/Urho3D,abdllhbyrktr/Urho3D,codedash64/Urho3D,cosmy1/Urho3D,kostik1337/Urho3D,c4augustus/Urho3D,codemon66/Urho3D,rokups/Urho3D,SuperWangKai/Urho3D,codedash64/Urho3D,urho3d/Urho3D,299299/Urho3D,fire/Urho3D-1,PredatorMF/Urho3D,299299/Urho3D,cosmy1/Urho3D,bacsmar/Urho3D,PredatorMF/Urho3D,cosmy1/Urho3D,luveti/Urho3D,victorholt/Urho3D,xiliu98/Urho3D,iainmerrick/Urho3D,PredatorMF/Urho3D,kostik1337/Urho3D,MonkeyFirst/Urho3D,victorholt/Urho3D,fire/Urho3D-1,weitjong/Urho3D,kostik1337/Urho3D,fire/Urho3D-1,codedash64/Urho3D,rokups/Urho3D,MonkeyFirst/Urho3D,victorholt/Urho3D,c4augustus/Urho3D,henu/Urho3D,299299/Urho3D,MonkeyFirst/Urho3D,c4augustus/Urho3D,cosmy1/Urho3D,carnalis/Urho3D,iainmerrick/Urho3D,299299/Urho3D,helingping/Urho3D,weitjong/Urho3D,rokups/Urho3D,iainmerrick/Urho3D,victorholt/Urho3D,c4augustus/Urho3D,eugeneko/Urho3D,henu/Urho3D,xiliu98/Urho3D,orefkov/Urho3D,SuperWangKai/Urho3D,c4augustus/Urho3D,luveti/Urho3D,carnalis/Urho3D,tommy3/Urho3D,kostik1337/Urho3D,weitjong/Urho3D,SirNate0/Urho3D,orefkov/Urho3D