Fixed includes in header, added destroy fn, clarity tweaks

include/devil1pld.h

@@ -2,17 +2,20 @@
 #define DEVIL1PLD_H
 
 #include <stdint.h>
-#pragma pack(1)
 struct PldHeader {
     int32_t numOffset;
     // array of numOffset elements
     uint32_t *offsets; // <format=hex>
 };
 
-// input: a pld header struct.
-void showpldh(struct PldHeader *);
-
 // input: contents of the .pld file.
+// allocates heap memory
 struct PldHeader *getpldh(const char*);
 
+// frees heap memory
+void destroypldh(struct PldHeader*);
+
+// input: a pld header struct.
+void showpldh(struct PldHeader*);
+
 #endif