Removing some compiler warnings.

src/display/camera.c

@@ -41,9 +41,9 @@ void cameraOrbit(camera_t *camera,
   float distance, float yaw, float pitch,
   float targetX, float targetY, float targetZ
 ) {
-  float cy = cos(pitch);
-  float x = distance * sin(yaw) * cy;
-  float y = distance * sin(pitch);
-  float z = distance * cos(yaw) * cy;
+  float cy = cosf(pitch);
+  float x = distance * sinf(yaw) * cy;
+  float y = distance * sinf(pitch);
+  float z = distance * cosf(yaw) * cy;
   cameraLookAt(camera, x, y, z, targetX, targetY, targetZ);
 }