gvpr TFA_Advance: squash -Wconversion warning from 'tolower' return

GCC is overly pedantic about the return type of the ctype.h functions.

diff --git a/lib/gvpr/trieFA.h b/lib/gvpr/trieFA.h
index 6369e4ad8a4545815efecf3edd097a211429753d..2bbd53926801707d8b032c8633c01da33ed517c3 100644 (file)
--- a/lib/gvpr/trieFA.h
+++ b/lib/gvpr/trieFA.h
@@ -62,7 +62,7 @@ static short          TFA_State;
        char            c = C;                                                                                                                          \
        if (TFA_State >= 0) {                                                                                                                   \
                if (isupper(c))                                                                                                                         \
-                       c = tolower(c);                                                                                                                 \
+                       c = (char)tolower(c);                                                                                                                   \
                else if (! IN_MASK_RANGE(c)) {                                                                                          \
                        TFA_State = -1;                                                                                                                 \
                        goto TFA_done;                                                                                                                  \