Add .h file ref previous commit

OpenFilesScreen.h

@@ -13,14 +13,18 @@ in the source distribution for its full text.
 #include "Panel.h"
 #include "FunctionBar.h"
 
+typedef struct OpenFiles_Data_ {
+   char* data[256];
+} OpenFiles_Data;
+
 typedef struct OpenFiles_ProcessData_ {
-   struct OpenFiles_FileData_* files;
+   OpenFiles_Data data;
    int error;
-   char* data[256];
+   struct OpenFiles_FileData_* files;
 } OpenFiles_ProcessData;
 
 typedef struct OpenFiles_FileData_ {
-   char* data[256];
+   OpenFiles_Data data;
    struct OpenFiles_FileData_* next;
 } OpenFiles_FileData;