Camera: fix non-virtual functions not being overriddable

Author: facchinm

libraries/Camera/src/camera.h

@@ -79,11 +79,11 @@ class ImageSensor {
         virtual int motionDetected() = 0;
         virtual void debug(Stream &stream) = 0;
 
-        int setStandby(bool enable) {
+        virtual int setStandby(bool enable) {
             return -1;
         }
 
-        int setTestPattern(bool enable, bool walking) {
+        virtual int setTestPattern(bool enable, bool walking) {
             return -1;
         }
 };

libraries/Himax_HM01B0/himax.h

@@ -41,7 +41,7 @@ class HM01B0: public ImageSensor {
         int setFrameRate(int32_t framerate);
         int setResolution(int32_t resolution);
         int setPixelFormat(int32_t pixformat);
-        int setTestPattern(bool enable, bool walking);
+        int setTestPattern(bool enable, bool walking) override;
         int enableMotionDetection(md_callback_t callback=NULL);
         int disableMotionDetection();
         int setMotionDetectionWindow(uint32_t x, uint32_t y, uint32_t w, uint32_t h);

libraries/Himax_HM0360/hm0360.h

@@ -41,7 +41,7 @@ class HM0360: public ImageSensor {
         int setFrameRate(int32_t framerate);
         int setResolution(int32_t resolution);
         int setPixelFormat(int32_t pixformat);
-        int setTestPattern(bool enable, bool walking);
+        int setTestPattern(bool enable, bool walking) override;
         int enableMotionDetection(md_callback_t callback=NULL);
         int disableMotionDetection();
         int setMotionDetectionWindow(uint32_t x, uint32_t y, uint32_t w, uint32_t h);