[gpsd-dev] Silence compiler warnings about array subscripts of type 'char'

[Matt]

Cygwin GCC complains about code like isprint(c), where c is of type char.
The isX() and toX() functions/macros (ISO C allows either) all accept an 
int, whose value should be either that of an unsigned char, or the 
special value EOF (== -1).
So cast to unsigned char each argument to isprint, tolower, etc.

Silences several warnings of the form:

gpsutils.c: In function 'safe_atof':
gpsutils.c:90:5: warning: array subscript has type 'char' 
[-Wchar-subscripts]
     while (isspace(*p)) {
     ^
gpsutils.c:188:2: warning: array subscript has type 'char' 
[-Wchar-subscripts]
  while (isdigit(*p)) {
  ^

silence-warnings-array-subscript-char.patch
Description: Text Data