sprintf warnings

stb_sprintf.h

@@ -182,7 +182,7 @@ PERFORMANCE vs MSVC 2008 32-/64-bit (GCC is even slower than MSVC):
 #ifndef STB_SPRINTF_MIN
 #define STB_SPRINTF_MIN 512 // how many characters per callback
 #endif
-typedef char *STBSP_SPRINTFCB(char *buf, void *user, int len);
+typedef char *STBSP_SPRINTFCB(const char *buf, void *user, int len);
 
 #ifndef STB_SPRINTF_DECORATE
 #define STB_SPRINTF_DECORATE(name) stbsp_##name // define this before including if you want to change the names

tests/test_sprintf.c

@@ -111,10 +111,10 @@ int main()
 #if __STDC_VERSION__ >= 199901L
 #if USE_STB
    CHECK4("Inf Inf NaN", "%g %G %f", INFINITY, INFINITY, NAN);
-   CHECK1("N", "%.1g", NAN);
+   CHECK2("N", "%.1g", NAN);
 #else
    CHECK4("inf INF nan", "%g %G %f", INFINITY, INFINITY, NAN);
-   CHECK1("nan", "%.1g", NAN);
+   CHECK2("nan", "%.1g", NAN);
 #endif
 #endif
 
@@ -150,9 +150,9 @@ int main()
    assert(strncmp(buf, "37778931862957161709568.000000", 17) == 0);
    n = SNPRINTF(buf, 10, "number %f", 123.456789);
    assert(strcmp(buf, "number 12") == 0);
-   assert(n == (USE_STB ? 9 : 17));  // written vs would-be written bytes
+   assert(n == 17);  // written vs would-be written bytes
    n = SNPRINTF(buf, 0, "7 chars");
-   assert(n == (USE_STB ? 0 : 7));
+   assert(n == 7);
    // stb_sprintf uses internal buffer of 512 chars - test longer string
    assert(SPRINTF(buf, "%d  %600s", 3, "abc") == 603);
    assert(strlen(buf) == 603);