Fixed issue with GUI-less compliation failing

FIXME: Make class for all the GUI stuff so that way the main.cpp can be cleaned up
and less bugs like this occur.

Step 3/cmake-build-release/.ninja_log

@@ -48,3 +48,7 @@
 2	1714	1667783529037241417	CMakeFiles/Step_3.dir/src/engine/raytracing.cpp.o	66d57ca8c497053f
 2	2081	1667783529405251409	CMakeFiles/Step_3.dir/src/engine/main.cpp.o	1ece1ef4ff463d7b
 2081	2148	1667783529473253256	Step_3	f055ce2b85635598
+1	1400	1667858649624647232	CMakeFiles/Step_3.dir/src/graphics/gl/gl.cpp.o	b114408b56d0322d
+1	2246	1667858650468670173	CMakeFiles/Step_3.dir/src/engine/main.cpp.o	1ece1ef4ff463d7b
+1	7206	1667858655428804980	CMakeFiles/Step_3.dir/src/engine/image/image.cpp.o	194bb23af2286607
+7207	7312	1667858655536807916	Step_3	f055ce2b85635598

Step 3/cmake-build-release/Testing/Temporary/LastTest.log

@@ -1,3 +1,3 @@
-Start testing: Nov 06 20:12 EST
+Start testing: Nov 07 17:04 EST
 ----------------------------------------------------------
-End testing: Nov 06 20:12 EST
+End testing: Nov 07 17:04 EST

Step 3/src/engine/image/image.cpp

@@ -7,6 +7,7 @@
 #include <fstream>
 #define STB_IMAGE_WRITE_IMPLEMENTATION
 #include "engine/image/stb_image_write.h"
+#define STB_IMAGE_IMPLEMENTATION
 #include "engine/image/stb_image.h"
 #define STB_IMAGE_RESIZE_IMPLEMENTATION
 #include "engine/image/stb_image_resize.h"

Step 3/src/engine/main.cpp

@@ -244,7 +244,9 @@ int main(int argc, char** args) {
     delete(haltExecution);
     delete(haltRaytracing);
     delete(pauseRaytracing);
+    #ifdef COMPILE_GUI
         deleteQuad();
+    #endif
     
     for (auto& p : Raytracing::profiles)
         delete(p.second);

Step 3/src/graphics/gl/gl.cpp

@@ -5,7 +5,6 @@
 
 #include <graphics/gl/gl.h>
 #include <GL/glx.h>
-#define STB_IMAGE_IMPLEMENTATION
 #include "engine/image/stb_image.h"
 
 #ifndef USE_GLFW