make function signatures more consistent

include/JSystem/JKernel/JKRAram.h

@@ -10,7 +10,7 @@ class JKRAMCommand;
 class JKRAramBlock;
 class JKRAram : public JKRThread {
 private:
-    JKRAram(u32, u32, long);
+    JKRAram(u32, u32, s32);
     virtual ~JKRAram();
 
     /* vt[03] */ void* run(void); /* override */

include/JSystem/JKernel/JKRDvdFile.h

@@ -15,7 +15,7 @@ class JKRDvdFile : public JKRFile {
 public:
     JKRDvdFile();
     JKRDvdFile(const char*);
-    JKRDvdFile(long);
+    JKRDvdFile(s32);
     virtual ~JKRDvdFile();
 
     void initiate(void);