Fixed warnings

src/events/SDL_mouse.c

@@ -508,7 +508,7 @@ static int SDL_PrivateSendMouseMotion(Uint64 timestamp, SDL_Window *window, SDL_
         mouse->x = x;
         mouse->y = y;
         mouse->has_position = SDL_TRUE;
-    } else if (!xrel && !yrel) { /* Drop events that don't change state */
+    } else if (xrel == 0.0f && yrel == 0.0f) { /* Drop events that don't change state */
 #ifdef DEBUG_MOUSE
         SDL_Log("Mouse event didn't change state - dropped!\n");
 #endif

src/file/SDL_rwops.c

@@ -375,7 +375,7 @@ stdio_read(SDL_RWops *context, void *ptr, Sint64 size)
 {
     size_t nread;
 
-    nread = fread(ptr, 1, size, (FILE *)context->hidden.stdio.fp);
+    nread = fread(ptr, 1, (size_t)size, (FILE *)context->hidden.stdio.fp);
     if (nread == 0 && ferror((FILE *)context->hidden.stdio.fp)) {
         return SDL_Error(SDL_EFREAD);
     }
@@ -387,7 +387,7 @@ stdio_write(SDL_RWops *context, const void *ptr, Sint64 size)
 {
     size_t nwrote;
 
-    nwrote = fwrite(ptr, 1, size, (FILE *)context->hidden.stdio.fp);
+    nwrote = fwrite(ptr, 1, (size_t)size, (FILE *)context->hidden.stdio.fp);
     if (nwrote == 0 && ferror((FILE *)context->hidden.stdio.fp)) {
         return SDL_Error(SDL_EFWRITE);
     }

src/joystick/hidapi/SDL_hidapi_xboxone.c

@@ -700,7 +700,7 @@ static void HIDAPI_DriverXboxOne_HandleStatePacket(SDL_Joystick *joystick, SDL_D
             }
         } else if (size == 64) {
             if (ctx->last_state[46] != data[46]) {
-                SDL_PrivateJoystickButton(joystick, SDL_GAMEPAD_BUTTON_MISC1, (data[46] & 0x01) ? SDL_PRESSED : SDL_RELEASED);
+                SDL_SendJoystickButton(joystick, SDL_GAMEPAD_BUTTON_MISC1, (data[46] & 0x01) ? SDL_PRESSED : SDL_RELEASED);
             }
         }
     }

src/timer/unix/SDL_systimer.c

@@ -158,8 +158,8 @@ void SDL_DelayNS(Uint64 ns)
 
     /* Set the timeout interval */
 #if HAVE_NANOSLEEP
-    remaining.tv_sec = (ns / SDL_NS_PER_SECOND);
-    remaining.tv_nsec = (ns % SDL_NS_PER_SECOND);
+    remaining.tv_sec = (time_t)(ns / SDL_NS_PER_SECOND);
+    remaining.tv_nsec = (long)(ns % SDL_NS_PER_SECOND);
 #else
     then = SDL_GetTicksNS();
 #endif

src/video/SDL_video.c

@@ -922,7 +922,7 @@ static SDL_DisplayMode *SDL_GetClosestDisplayModeForDisplay(SDL_VideoDisplay *di
     }
 
     /* Default to the desktop refresh rate */
-    if (mode->refresh_rate) {
+    if (mode->refresh_rate > 0.0f) {
         target_refresh_rate = mode->refresh_rate;
     } else {
         target_refresh_rate = display->desktop_mode.refresh_rate;
@@ -981,7 +981,7 @@ static SDL_DisplayMode *SDL_GetClosestDisplayModeForDisplay(SDL_VideoDisplay *di
             closest->w = mode->w;
             closest->h = mode->h;
         }
-        if (match->refresh_rate) {
+        if (match->refresh_rate > 0.0f) {
             closest->refresh_rate = match->refresh_rate;
         } else {
             closest->refresh_rate = mode->refresh_rate;
@@ -1043,7 +1043,7 @@ static int SDL_SetDisplayModeForDisplay(SDL_VideoDisplay *display, const SDL_Dis
         if (!display_mode.h) {
             display_mode.h = display->current_mode.h;
         }
-        if (!display_mode.refresh_rate) {
+        if (display_mode.refresh_rate == 0.0f) {
             display_mode.refresh_rate = display->current_mode.refresh_rate;
         }