From: Matthew Fernandez <matthew.fernandez@gmail.com>
Date: Thu, 8 Sep 2022 03:56:00 +0000 (-0700)
Subject: gvpr TFA_Advance: squash warnings in calling ctype.h functions
X-Git-Tag: 6.0.1~5^2~1
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=20b8bbf2ab9378bc6666b60fe2ac74766f06fc25;p=graphviz

gvpr TFA_Advance: squash warnings in calling ctype.h functions

Some standard libraries implement the ctype.h functions as macros in a way that
triggers compiler warnings if the parameter is not int-typed.
---

diff --git a/lib/gvpr/trieFA.h b/lib/gvpr/trieFA.h
index 2bbd53926..36ffb4d69 100644
--- a/lib/gvpr/trieFA.h
+++ b/lib/gvpr/trieFA.h
@@ -61,8 +61,8 @@ static short		TFA_State;
 #define TFA_Advance(C)	{															\
 	char		c = C;																\
 	if (TFA_State >= 0) {															\
-		if (isupper(c))																\
-			c = (char)tolower(c);															\
+		if (isupper((int)c))																\
+			c = (char)tolower((int)c);															\
 		else if (! IN_MASK_RANGE(c)) {												\
 			TFA_State = -1;															\
 			goto TFA_done;															\