Fix warnings

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30759 a1c6a512-1295-4272-9138-f99709370657

apps/plugins/fire.c

@@ -303,7 +303,7 @@ static int init_grey(void)
 }
 #endif
 
-static int main(void)
+int main(void)
 {
     int action;
 

apps/plugins/plasma.c

@@ -150,7 +150,7 @@ static void cleanup(void)
  * algorithm.
  */
 
-static int main(void)
+int main(void)
 {
     plasma_frequency = 1;
     int action, x, y;

apps/plugins/video.c

@@ -216,6 +216,7 @@ static int Available(unsigned char* pSnapshot)
 }
 
 /* debug function to draw buffer indicators */
+#ifdef VIDEO_DEBUG
 static void DrawBuf(void)
 {
     int ypos, fill, video, audio;
@@ -244,6 +245,7 @@ static void DrawBuf(void)
     else
         gPlay.bDirtyOSD = true; /* redraw it with next timer IRQ */
 }
+#endif
 
 
 /* helper function to draw a position indicator */