Fix procedure as argument in sprintf() and lsprintf() not resolving

Fix procedure as second and third argument in `sprintf()` and `lsprintf()` respectively causing a compile error when trying to resolve the procedure during optimization.

Fixes:
```
:proc _a() { return 123; } msg(sprintf('%x', _a()));
COMPILE ERROR: The function "_a" does not exist in the Java Interpreter
        at :Interpreter:1.45
```

src/main/java/com/laytonsmith/core/functions/StringHandling.java

@@ -1623,6 +1623,7 @@ public ParseTree optimizeDynamic(Target t, Environment env,
 				me.setChildren(children);
 				me.setOptimized(true); //After this run, we will be, anyways.
 				if(children.size() == 3 && children.get(2).getData() instanceof CFunction
+						&& ((CFunction) children.get(2).getData()).hasFunction()
 						&& ((CFunction) children.get(2).getData()).getFunction().getName().equals(array.NAME)) {
 					//Normally we can't do anything with a hardcoded array, it's considered dynamic. But in this case, we can at least pull up the arguments,
 					//because the array's size is constant, even if the arguments in it aren't.