fix subprocess call

Author: skvark

setup.py

@@ -150,7 +150,7 @@ def main():
     if sys.platform.startswith('linux') and not x64:
         cmake_args.append("-DCMAKE_CXX_FLAGS=-U__STRICT_ANSI__")
         # patch openEXR when building on i386, see: https://github.com/openexr/openexr/issues/128
-        subprocess.check_call(["patch", "-p0", "<", "patches/patchOpenEXR"])
+        subprocess.check_call("patch -p0 < patches/patchOpenEXR", shell=True)
 
 
     if 'CMAKE_ARGS' in os.environ: