minilibc: no double braces in if statement

components/libc/minilibc/string.c

@@ -146,10 +146,10 @@ int  strncasecmp ( const char* s1, const char* s2, size_t len )
 		x1 = *s1 - 'A'; if ((x1 < 26u)) x1 += 32;
 		s1++; s2++;
 
-		if ((x2 != x1))
+		if (x2 != x1)
 			break;
 
-		if ((x1 == (unsigned int)-'A'))
+		if (x1 == (unsigned int)-'A')
 			break;
 	}