Enable more sanitizers in make develop (#1588)

- `-fsanitize=undefined` encompasses multiple checks we were specifying

- "detect_leaks=1" for `__asan_default_options` checks for memory leaks
  (except for with macOS clang++, which does not support LSan)

- `-fsanitize=float-divide-by-zero` is an extra UBSan check
  (and reveals a UB bug to fix with fixed-point `DIV` and `LOG`)

test/asm/math.asm

@@ -37,6 +37,9 @@ ENDM
 
 	assert LOG(100.0, 10.0) == 2.0
 	assert LOG(256.0, 2.0) == 8.0
+	assert LOG(10.0, 1.0) == $7fff_ffff ; +inf
+	assert LOG(0.0, 2.71828) == $8000_0000 ; -inf
+	assert LOG(-1.0, 2.71828) == 0 ; nan
 
 	assert ROUND(1.5) == 2.0
 	assert ROUND(-1.5) == -2.0