Fix a bug to enable/disable DEBUG under MSVC
Fix a bug to enable/disable DEBUG under MSVC

Original commit message from CVS:
Fix a bug to enable/disable DEBUG under MSVC

magcius/gstreamer,collects/gstreamer,cablelabs/gstreamer,ensonic/gstreamer,shelsonjava/gstreamer,mrchapp/gstreamer,krichter722/gstreamer,surround-io/gstreamer,justinjoy/gstreamer,lovebug356/gstreamer,StreamUtils/gstreamer,krichter722/gstreamer,shelsonjava/gstreamer,mparis/gstreamer,mrchapp/gstreamer,mrchapp/gstreamer,magcius/gstreamer,Distrotech/gstreamer,ylatuya/gstreamer,jpxiong/gstreamer,shelsonjava/gstreamer,lovebug356/gstreamer,lubosz/gstreamer,surround-io/gstreamer,StreamUtils/gstreamer,mrchapp/gstreamer,ahmedammar/platform_external_gst_gstreamer,cablelabs/gstreamer,Lachann/gstreamer,ylatuya/gstreamer,collects/gstreamer,lubosz/gstreamer,cfoch/gstreamer,collects/gstreamer,drothlis/gstreamer,lovebug356/gstreamer,mparis/gstreamer,cfoch/gstreamer,magcius/gstreamer,surround-io/gstreamer,cablelabs/gstreamer,drothlis/gstreamer,jpakkane/gstreamer,krieger-od/gstreamer,ylatuya/gstreamer,shelsonjava/gstreamer,jpakkane/gstreamer,krieger-od/gstreamer,collects/gstreamer,lovebug356/gstreamer,drothlis/gstreamer,krichter722/gstreamer,Distrotech/gstreamer,lubosz/gstreamer,mparis/gstreamer,cfoch/gstreamer,drothlis/gstreamer,Distrotech/gstreamer,ahmedammar/platform_external_gst_gstreamer,magcius/gstreamer,Lachann/gstreamer,justinjoy/gstreamer,lovebug356/gstreamer,cfoch/gstreamer,ahmedammar/platform_external_gst_gstreamer,krieger-od/gstreamer,StreamUtils/gstreamer,ensonic/gstreamer,StreamUtils/gstreamer,justinjoy/gstreamer,krichter722/gstreamer,ensonic/gstreamer,Lachann/gstreamer,krieger-od/gstreamer,jpakkane/gstreamer,jpxiong/gstreamer,ylatuya/gstreamer,mrchapp/gstreamer,mparis/gstreamer,Distrotech/gstreamer,jpxiong/gstreamer,Lachann/gstreamer,justinjoy/gstreamer,lubosz/gstreamer,centricular/gstreamer,surround-io/gstreamer,krieger-od/gstreamer,centricular/gstreamer,jpxiong/gstreamer,Distrotech/gstreamer,centricular/gstreamer,justinjoy/gstreamer,cfoch/gstreamer,cablelabs/gstreamer,lubosz/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,magcius/gstreamer,ahmedammar/platform_external_gst_gstreamer,centricular/gstreamer,ahmedammar/platform_external_gst_gstreamer,mparis/gstreamer,ensonic/gstreamer,jpakkane/gstreamer,ensonic/gstreamer,cablelabs/gstreamer,jpakkane/gstreamer,krichter722/gstreamer,collects/gstreamer,shelsonjava/gstreamer,drothlis/gstreamer,ylatuya/gstreamer,surround-io/gstreamer,centricular/gstreamer,Lachann/gstreamer