Close the file handle if it is not the cpu frequency driver.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31490 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/preferences/cpufrequency/DriverInterface.cpp

@@ -212,6 +212,8 @@ CPUFreqDriverInterface::_FindSpeedStepDriver(const char* path)
 								sizeof(uint32));
 				if (ret == B_OK && magicId == kMagicFreqID)
 					return B_OK;
+				else
+					close(fDriverHandler);
 			}
 		}