Fix a minor osdutil build warning (seen with gcc 4.8.1)
Fix a minor osdutil build warning (seen with gcc 4.8.1)

c64kernal/OpenSubdiv,poljere/OpenSubdiv,shengfuintel/OpenSubdiv,shengfuintel/OpenSubdiv,poljere/OpenSubdiv,anshuarya/OpenSubdiv,c64kernal/OpenSubdiv,takahito-tejima/OpenSubdiv-exp,jcowles/OpenSubdiv,takahito-tejima/OpenSubdiv,xldeveloper/OpenSubdiv,xldeveloper/OpenSubdiv,lookup1980/OpenSubdiv,takahito-tejima/OpenSubdiv-exp,poljere/OpenSubdiv,jcowles/OpenSubdiv,c64kernal/OpenSubdiv,jcowles/OpenSubdiv,anshuarya/OpenSubdiv,takahito-tejima/OpenSubdiv,nyotis/OpenSubdiv,nyotis/OpenSubdiv,xldeveloper/OpenSubdiv,takahito-tejima/OpenSubdiv-exp,shengfuintel/OpenSubdiv,lookup1980/OpenSubdiv,takahito-tejima/OpenSubdiv-exp,lookup1980/OpenSubdiv,takahito-tejima/OpenSubdiv,anshuarya/OpenSubdiv,nyotis/OpenSubdiv