Merge pull request #498 from AllenX2018/fix-issue441

fix issue #441: remove strtod definition in strconv.c

src/strconv.c

@@ -3,9 +3,6 @@
 #include <stdio.h>
 #include <string.h>
 #include <math.h>
-#ifdef __MINGW32__
-#undef __NO_ISOCEXT /* ensure stdlib.h will declare prototypes for mingw own 'strtod' replacement, called '__strtod' */
-#endif
 #include "jansson_private.h"
 #include "strbuffer.h"
 
@@ -14,10 +11,6 @@
 #include <jansson_private_config.h>
 #endif
 
-#ifdef __MINGW32__
-#define strtod __strtod
-#endif
-
 #if JSON_HAVE_LOCALECONV
 #include <locale.h>