Cleanup FCEU_MakeFName

- silence warnings: replace strncpy with strcpy instead. this should be safe since buffer is strlen+1 which should be enough for a null terminator (from sprintf)
- minor cleanup

src/general.h

@@ -6,17 +6,12 @@ extern uint32 uppow2(uint32 n);
 
 char *FCEU_MakeFName(int type, int id1, char *cd1);
 
-#define FCEUMKF_STATE  1
-#define FCEUMKF_SNAP  2
-#define FCEUMKF_SAV  3
-#define FCEUMKF_CHEAT  4
-#define FCEUMKF_FDSROM  5
-#define FCEUMKF_PALETTE  6
-#define FCEUMKF_GGROM  7
-#define FCEUMKF_IPS  8
-#define FCEUMKF_FDS  9
-#define FCEUMKF_MOVIE  10
-#define FCEUMKF_NPTEMP  11
-#define FCEUCOPY_FAMI 12
+enum FILE_TYPES
+{
+    FCEUMKF_FDSROM = 1,
+    FCEUMKF_PALETTE,
+    FCEUMKF_GGROM,
+    FCEUMKF_FDS
+};
 
 #endif