SDL_test: use SDLCALL calling convention

This is needed when using a pre-built static SDL3_test library.

include/SDL3/SDL_test_memory.h

@@ -36,28 +36,26 @@
 extern "C" {
 #endif
 
-
 /**
  * Start tracking SDL memory allocations
  *
  * \note This should be called before any other SDL functions for complete tracking coverage
  */
-void SDLTest_TrackAllocations(void);
+void SDLCALL SDLTest_TrackAllocations(void);
 
 /**
  * Fill allocations with random data
  *
  * \note This implicitly calls SDLTest_TrackAllocations()
  */
-void SDLTest_RandFillAllocations(void);
+void SDLCALL SDLTest_RandFillAllocations(void);
 
 /**
  * Print a log of any outstanding allocations
  *
  * \note This can be called after SDL_Quit()
  */
-void SDLTest_LogAllocations(void);
-
+void SDLCALL SDLTest_LogAllocations(void);
 
 /* Ends C function definitions when using C++ */
 #ifdef __cplusplus