iOS Build number

Okay, an interesting thing about iOS 9.3 first beta. When you get the build number, it appends a /0 char at the end of the string. Made a quick fix for this, here is the code to get clean build number:

	-(NSString *)getOSBuildNumber {
	int mib[2] = {CTL_KERN, KERN_OSVERSION};
	u_int namelen = sizeof(mib) / sizeof(mib[0]);
	size_t bufferSize = 0;
	NSString *osBuildVersion = nil;
	// Get the size for the buffer
	sysctl(mib, namelen, NULL, &bufferSize, NULL, 0);
	u_char buildBuffer[bufferSize];
	int result = sysctl(mib, namelen, buildBuffer, &bufferSize, NULL, 0);
	if (result >= 0) {
	osBuildVersion = [[NSString alloc] initWithBytes:buildBuffer length:bufferSize encoding:NSUTF8StringEncoding];
	}
	NSCharacterSet *charsToRemove = [[NSCharacterSet alphanumericCharacterSet] invertedSet];
	return [[osBuildVersion componentsSeparatedByCharactersInSet:charsToRemove] componentsJoinedByString:@""];
	}

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