Fixed the incorrect parsing of exponentiated numbers like 1e100.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%403221

dlib/cpp_tokenizer/cpp_tokenizer_kernel_1.h

@@ -444,12 +444,13 @@ namespace dlib
                         }
 
                     }
-                    // or this could be a floating point value
-                    else if (tokenizer.peek_type() == tok::CHAR && tokenizer.peek_token()[0] == '.')
+                    // or this could be a floating point value or something with an 'e' or 'E' in it.
+                    else if ((tokenizer.peek_type() == tok::CHAR && tokenizer.peek_token()[0] == '.') ||
+                             (tokenizer.peek_type() == tok::IDENTIFIER && std::tolower(tokenizer.peek_token()[0]) == 'e'))
                     {
                         std::string temp;
                         tokenizer.get_token(type,temp);
-                        token += '.';
+                        token += temp;
                         // now get the rest of the floating point value
                         while (tokenizer.peek_type() == tok::IDENTIFIER ||
                                tokenizer.peek_type() == tok::NUMBER