patch 8.0.0774: build failure without the multi-byte feature

Problem:    Build failure without the multi-byte feature on HPUX.
Solution:   Move #ifdefs. (John Marriott)
diff --git a/src/term.c b/src/term.c
index 26527fb..1fa9dfd 100644
--- a/src/term.c
+++ b/src/term.c
@@ -4307,16 +4307,17 @@
 			    || (tp[0] == CSI && len >= 2))
 			&& (VIM_ISDIGIT(*argp) || *argp == '>' || *argp == '?'))
 	    {
+		int col = 0;
+		int semicols = 0;
 #ifdef FEAT_MBYTE
-		int col;
 		int row_char = NUL;
 #endif
-		j = 0;
+
 		extra = 0;
 		for (i = 2 + (tp[0] != CSI); i < len
 				&& !(tp[i] >= '{' && tp[i] <= '~')
 				&& !ASCII_ISALPHA(tp[i]); ++i)
-		    if (tp[i] == ';' && ++j == 1)
+		    if (tp[i] == ';' && ++semicols == 1)
 		    {
 			extra = i + 1;
 #ifdef FEAT_MBYTE
@@ -4328,17 +4329,15 @@
 		    LOG_TR("Not enough characters for CRV");
 		    return -1;
 		}
-#ifdef FEAT_MBYTE
 		if (extra > 0)
 		    col = atoi((char *)tp + extra);
-		else
-		    col = 0;
 
+#ifdef FEAT_MBYTE
 		/* Eat it when it has 2 arguments and ends in 'R'. Also when
 		 * u7_status is not "sent", it may be from a previous Vim that
 		 * just exited.  But not for <S-F3>, it sends something
 		 * similar, check for row and column to make sense. */
-		if (j == 1 && tp[i] == 'R')
+		if (semicols == 1 && tp[i] == 'R')
 		{
 		    if (row_char == '2' && col >= 2)
 		    {
@@ -4401,7 +4400,7 @@
 		    if (col > 20000)
 			col = 0;
 
-		    if (tp[1 + (tp[0] != CSI)] == '>' && j == 2)
+		    if (tp[1 + (tp[0] != CSI)] == '>' && semicols == 2)
 		    {
 			/* Only set 'ttymouse' automatically if it was not set
 			 * by the user already. */