Use NoLocalStrtod for international compliance

Recieved errors pasing json files with decimal floats from European colleagues

src/google/protobuf/stubs/strutil.cc

@@ -41,6 +41,7 @@
 #include <limits>
 
 #include <google/protobuf/stubs/stl_util.h>
+#include <google/protobuf/io/strtod.h>
 
 #ifdef _WIN32
 // MSVC has only _snprintf, not snprintf.
@@ -1286,7 +1287,7 @@ char* DoubleToBuffer(double value, char* buffer) {
   // of a double.  This long double may have extra bits that make it compare
   // unequal to "value" even though it would be exactly equal if it were
   // truncated to a double.
-  volatile double parsed_value = strtod(buffer, nullptr);
+  volatile double parsed_value = io::NoLocaleStrtod(buffer, nullptr);
   if (parsed_value != value) {
     int snprintf_result =
       snprintf(buffer, kDoubleToBufferSize, "%.*g", DBL_DIG+2, value);
@@ -1338,7 +1339,7 @@ bool safe_strtof(const char* str, float* value) {
   char* endptr;
   errno = 0;  // errno only gets set on errors
 #if defined(_WIN32) || defined (__hpux)  // has no strtof()
-  *value = strtod(str, &endptr);
+  *value = io::NoLocaleStrtod(str, &endptr);
 #else
   *value = strtof(str, &endptr);
 #endif
@@ -1347,7 +1348,7 @@ bool safe_strtof(const char* str, float* value) {
 
 bool safe_strtod(const char* str, double* value) {
   char* endptr;
-  *value = strtod(str, &endptr);
+  *value = io::NoLocaleStrtod(str, &endptr);
   if (endptr != str) {
     while (ascii_isspace(*endptr)) ++endptr;
   }