Bug fix in string to int parse code

If the string to parse is "0" (or "00", "000", "0000...", etc.) then after all
the "leading zeroes" have been skipped, cur and end will point to the same
location, causing the function to return false.

To fix, check if we have reached end-of-string after skipping the leading
zeroes. If we have reached the end of the string and this is not an empty
string (i.e. count > 0) then the parsed integer has value 0 and we can return
true.

src/scripting/toplevel/Integer.cpp

@@ -247,8 +247,19 @@ bool Integer::fromStringFlashCompatible(const char* cur, int64_t& ret, int radix
 	//Skip leading zeroes
 	if (radix == 0)
 	{
+		int count=0;
 		while(*cur=='0')
+		{
 			cur++;
+			count++;
+		}
+
+		//The string consisted of all zeroes
+		if(count>0 && *cur=='\0')
+		{
+			ret = 0;
+			return true;
+		}
 	}
 
 	errno=0;