Fix unused variable warnings in convolve_separable
Fix unused variable warnings in convolve_separable

unbornchikken/arrayfire,munnybearz/arrayfire,Keno/arrayfire,9prady9/arrayfire,hshindo/arrayfire,pombredanne/arrayfire,shehzan10/arrayfire,merlin-ext/arrayfire,ghisvail/arrayfire,merlin-ext/arrayfire,HolyGeneralK/arrayfire,merlin-ext/arrayfire,pentschev/arrayfire,marbre/arrayfire,unbornchikken/arrayfire,victorv/arrayfire,bkloppenborg/arrayfire,glehmann/arrayfire,hshindo/arrayfire,HolyGeneralK/arrayfire,umar456/arrayfire,mrgloom/arrayfire,9prady9/arrayfire,arrayfire/arrayfire,Keno/arrayfire,arrayfire/arrayfire,jramapuram/arrayfire,HolyGeneralK/arrayfire,hshindo/arrayfire,Keno/arrayfire,marbre/arrayfire,umar456/arrayfire,hshindo/arrayfire,pentschev/arrayfire,mrgloom/arrayfire,9prady9/arrayfire,asifmadnan/arrayfire,pombredanne/arrayfire,pentschev/arrayfire,victorv/arrayfire,jramapuram/arrayfire,Keno/arrayfire,asifmadnan/arrayfire,ghisvail/arrayfire,merlin-ext/arrayfire,pentschev/arrayfire,bkloppenborg/arrayfire,asifmadnan/arrayfire,linan7788626/arrayfire,marbre/arrayfire,HolyGeneralK/arrayfire,shehzan10/arrayfire,jramapuram/arrayfire,glehmann/arrayfire,munnybearz/arrayfire,munnybearz/arrayfire,jramapuram/arrayfire,asifmadnan/arrayfire,linan7788626/arrayfire,pombredanne/arrayfire,linan7788626/arrayfire,mrgloom/arrayfire,marbre/arrayfire,bkloppenborg/arrayfire,shehzan10/arrayfire,umar456/arrayfire,arrayfire/arrayfire,umar456/arrayfire,ghisvail/arrayfire,unbornchikken/arrayfire,linan7788626/arrayfire,9prady9/arrayfire,bkloppenborg/arrayfire,shehzan10/arrayfire,arrayfire/arrayfire,victorv/arrayfire,mrgloom/arrayfire,victorv/arrayfire,pombredanne/arrayfire,unbornchikken/arrayfire,ghisvail/arrayfire