Fix compile errors & drop the END state

We can't ++ enums in C++, it seems, so use a switch statement instead. Also
qualify the EEPROMKeymap object, so we call the object method, instead of trying
to call a method on a class as if it was an object. Oops.

Within this process, drop the END state, it is not required anymore.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

src/Kaleidoscope/EEPROM-Keymap-Programmer.cpp

@@ -33,11 +33,17 @@ namespace KaleidoscopePlugins {
 
   void
   EEPROMKeymapProgrammer::nextState (void) {
-    state++;
-
-    if (state == END) {
-      EEPROMKeymap.updateKey (updatePosition, newKey);
+    switch (state) {
+    case INACTIVE:
+      state = WAIT_FOR_KEY;
+      break;
+    case WAIT_FOR_KEY:
+      state = WAIT_FOR_CODE;
+      break;
+    case WAIT_FOR_CODE:
+      ::EEPROMKeymap.updateKey (updatePosition, newKey);
       cancel ();
+      break;
     }
   }
 
@@ -50,7 +56,7 @@ namespace KaleidoscopePlugins {
 
   Key
   EEPROMKeymapProgrammer::eventHandlerHook (Key mappedKey, byte row, byte col, uint8_t keyState) {
-    if (state == INACTIVE || state == END)
+    if (state == INACTIVE)
       return mappedKey;
 
     if (state == WAIT_FOR_KEY) {

src/Kaleidoscope/EEPROM-Keymap-Programmer.h

@@ -38,7 +38,6 @@ namespace KaleidoscopePlugins {
       INACTIVE,
       WAIT_FOR_KEY,
       WAIT_FOR_CODE,
-      END
     } state_t;
     static state_t state;