Flash wasn't unlocked for USB access

.gitignore

@@ -4,3 +4,4 @@
 radio/src/bootloader/.dep/
 radio/src/bootloader/bootloader_ramBoot*
 *.lbm
+*.o

radio/src/.gitignore

@@ -6,7 +6,6 @@
 /snapshot_*.png
 /*.sh
 /*.bat
-/*.o
 /*.bin
 /*.bin.*
 /*.hex

radio/src/bootloader/.gitignore

@@ -1 +0,0 @@
-/*.o

radio/src/bootloader/boot.cpp

@@ -550,6 +550,10 @@ int main()
       if (state != ST_USB) {
         if (usbPlugged()) {
           state = ST_USB;
+          if (!unlocked) {
+            unlocked = 1;
+            unlockFlash();
+          }
           usbPluggedIn();
         }
       }
@@ -584,6 +588,10 @@ int main()
         lcd_putsLeft(4*FH, "\026USB Connected");
         if (usbPlugged() == 0) {
           vpos = 0;
+          if (unlocked) {
+            lockFlash();
+            unlocked = 0;
+          }
           state = ST_START;
         }
 #if defined(PCBSKY9X)