tweaks: use FALSE for booleans instead of zero

Also adjust some indentation and reduce the scope of a variable.

src/chars.c

@@ -70,7 +70,7 @@ bool is_alpha_mbchar(const char *c)
 		wchar_t wc;
 
 		if (mbtowc(&wc, c, MAXCHARLEN) < 0)
-			return 0;
+			return FALSE;
 
 		return iswalpha(wc);
 	} else
@@ -86,7 +86,7 @@ bool is_alnum_mbchar(const char *c)
 		wchar_t wc;
 
 		if (mbtowc(&wc, c, MAXCHARLEN) < 0)
-			return 0;
+			return FALSE;
 
 		return iswalnum(wc);
 	} else
@@ -102,7 +102,7 @@ bool is_blank_mbchar(const char *c)
 		wchar_t wc;
 
 		if (mbtowc(&wc, c, MAXCHARLEN) < 0)
-			return 0;
+			return FALSE;
 
 		return iswblank(wc);
 	} else
@@ -139,7 +139,7 @@ bool is_punct_mbchar(const char *c)
 		wchar_t wc;
 
 		if (mbtowc(&wc, c, MAXCHARLEN) < 0)
-			return 0;
+			return FALSE;
 
 		return iswpunct(wc);
 	} else

src/color.c

@@ -331,12 +331,10 @@ void check_the_multis(linestruct *line)
 /* Allocate (for one line) the cache space for multiline color regexes. */
 void alloc_multidata_if_needed(linestruct *fileptr)
 {
-	int i;
-
 	if (fileptr->multidata == NULL) {
 		fileptr->multidata = (short *)nmalloc(openfile->syntax->nmultis * sizeof(short));
 
-		for (i = 0; i < openfile->syntax->nmultis; i++)
+		for (int i = 0; i < openfile->syntax->nmultis; i++)
 			fileptr->multidata[i] = -1;
 	}
 }

src/cut.c

@@ -341,9 +341,9 @@ void do_cut_text(bool copying, bool marked, bool until_eof, bool append)
 		if (using_magicline)
 			UNSET(NO_NEWLINES);
 	} else
-#endif /* !NANO_TINY */
-
+#endif
 		set_modified();
+
 	refresh_needed = TRUE;
 }