Prevent stb_image from exporting public symbols in the love dll

src/modules/image/magpie/STBHandler.cpp

@@ -30,12 +30,13 @@ static void loveSTBIAssert(bool test, const char *teststr)
 }
 
 // stb_image
- #define STBI_ONLY_JPEG
+#define STBI_ONLY_JPEG
 // #define STBI_ONLY_PNG
 #define STBI_ONLY_BMP
 #define STBI_ONLY_TGA
 #define STBI_ONLY_HDR
 #define STBI_NO_STDIO
+#define STB_IMAGE_STATIC
 #define STB_IMAGE_IMPLEMENTATION
 #define STBI_ASSERT(A) loveSTBIAssert((A), #A)
 #include "libraries/stb/stb_image.h"