More warning messages during compile with Adafruit_GFX.cpp

[randypeck]

Sorry I'm not familiar with the etiquette here, but wanted to report some warning messages I get every time I compile with Adafruit_GFX. In addition to the unused variable 'xa' described in Issue 89, I'm seeing the following warnings when I compile (with warnings set to 'more' or 'all'):

C:\Users\Randy\Dropbox\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GFX.cpp: At global scope:

C:\Users\Randy\Dropbox\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GFX.cpp:879:42: warning: unused parameter 'i' [-Wunused-parameter]

void Adafruit_GFX::invertDisplay(boolean i) {

                                      ^

C:\Users\Randy\Dropbox\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GFX.cpp: In member function 'boolean Adafruit_GFX_Button::contains(int16_t, int16_t)':

C:\Users\Randy\Dropbox\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GFX.cpp:931:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]

if ((x < (_x - _w/2)) || (x > (_x + _w/2))) return false;

      ^

C:\Users\Randy\Dropbox\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GFX.cpp:931:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]

if ((x < (_x - _w/2)) || (x > (_x + _w/2))) return false;

                           ^

C:\Users\Randy\Dropbox\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GFX.cpp:932:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]

if ((y < (_y - _h/2)) || (y > (_y + _h/2))) return false;

      ^

C:\Users\Randy\Dropbox\Arduino\libraries\Adafruit_GFX_Library\Adafruit_GFX.cpp:932:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]

if ((y < (_y - _h/2)) || (y > (_y + _h/2))) return false;

                           ^