Weed out extreme exponents in strtod.

src/conversions.cc

Index: src/conversions.cc
diff --git a/src/conversions.cc b/src/conversions.cc
index a7a0867663926d7cb9c32366c39e58f94350ae2b..790e807aef4f898413774f6c0c6b6f7ca648e7ea 100644
--- a/src/conversions.cc
+++ b/src/conversions.cc
@@ -353,7 +353,7 @@ static double InternalStringToInt(Iterator current, EndMark end, int radix) {
 
     ASSERT(buffer_pos < kBufferSize);
     buffer[buffer_pos] = '\0';
-    Vector<char> buffer_vector(buffer, buffer_pos);
+    Vector<const char> buffer_vector(buffer, buffer_pos);
     return sign ? -Strtod(buffer_vector, 0) : Strtod(buffer_vector, 0);
   }
 
@@ -653,7 +653,7 @@ static double InternalStringToDouble(Iterator current,
   ASSERT(buffer_pos < kBufferSize);
   buffer[buffer_pos] = '\0';
 
-  double converted = Strtod(Vector<char>(buffer, buffer_pos), exponent);
+  double converted = Strtod(Vector<const char>(buffer, buffer_pos), exponent);
   return sign? -converted: converted;
 }