Moved errno to strtod.c as one can use m_string.h without errno.h

include/m_string.h

@@ -218,9 +218,6 @@ extern int is_prefix(const char *, const char *);
 /* Conversion routines */
 double my_strtod(const char *str, char **end);
 double my_atof(const char *nptr);
-#ifndef EOVERFLOW
-#define EOVERFLOW 84
-#endif
 
 #ifdef USE_MY_ITOA
 extern char *my_itoa(int val,char *dst,int radix);

strings/strtod.c

@@ -26,9 +26,13 @@
 
  */
 
-#include "my_base.h"
+#include "my_base.h"				/* Includes errno.h */
 #include "m_ctype.h"
 
+#ifndef EOVERFLOW
+#define EOVERFLOW 84
+#endif
+
 static double scaler10[] = {
   1.0, 1e10, 1e20, 1e30, 1e40, 1e50, 1e60, 1e70, 1e80, 1e90
 };
@@ -37,10 +41,6 @@ static double scaler1[] = {
 };
 
 
-#ifndef HUGE_VAL				/* Should be +Infinitive */
-#define HUGE_VAL DBL_MAX
-#endif
-
 double my_strtod(const char *str, char **end)
 {
   double result= 0.0;