AP_HAL_F4light: fixes OSD compilation issue

libraries/AP_HAL_F4Light/hardware/osd/osd.cpp

@@ -44,6 +44,8 @@ using namespace F4Light;
 
 namespace OSDns {
 
+class BetterStream : AP_HAL::BetterStream {};
+
 #include "osd_core/GCS_MAVLink.h"
 
 #include "osd_core/OSD_Max7456.h"

libraries/AP_HAL_F4Light/hardware/osd/osd.h

@@ -16,7 +16,6 @@ extern const AP_HAL::HAL& hal;
 #include "osd_core/compat.h"
 #include "osd_core/Defs.h"
 
-
 #define OSD_LOW_PRIORITY 115 // 15 less than main task so runs almost only in delay() time - 1/16 of main thread
 #define OSD_HIGH_PRIORITY 99 //  1 more than main so uses 2/3 of CPU
 
@@ -37,5 +36,7 @@ namespace OSDns {// OSD interface emulates UART
     void update_max_buffer(const uint8_t *buffer, uint16_t len);
 
     inline uint32_t millis(){ return AP_HAL::millis(); }
+    
+    class BetterStream;
 }
 #endif

libraries/AP_HAL_F4Light/hardware/osd/osd_core/Params.h

@@ -1 +1 @@
-/mnt/disk_d/src/quad-copter/minimosd-extra/MinimOsd_Extra/Params.h
+../../../support/minimosd-extra/MinimOsd_Extra/Params.h

libraries/AP_HAL_F4Light/hardware/osd/osd_core/compat.h

@@ -31,6 +31,7 @@ typedef const char * PGM_P;
 #define TO_STRING2(x) #x
 #define TO_STRING(x) TO_STRING2(x)
 
+
 static inline int max(int a, int b){
     if(a>b) return a;
     return b;