Fixed some possible typing issues that make for warnings with most good warnings enabled (https://github.com/tewha/MoreWarnings-xcconfig).
More typing changes
Merge branch 'master' of github.com:jazz14456/CocoaLumberjack into jazz14456-master

Conflicts:
	Lumberjack/DDTTYLogger.m
Add changes suggested here https://github.com/CocoaLumberjack/CocoaLumberjack/pull/245#discussion_r10870927
Fix analyzer warning

```
Call to 'malloc' has an allocation size of 0 bytes
    Class *classes = (Class *)malloc(sizeof(Class) * numClasses);
                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.

Call to 'malloc' has an allocation size of 0 bytes
Assuming '__a1' is < '__b1'
Call to 'malloc' has an allocation size of 0 bytes
```
Merge pull request #279 from rivera-ernesto/fix_warnings

Fix warnings