Fix decoding quoted printable multiline string with blank space

on beginning of line in libkcal/versit
This resolves bug 2688

Signed-off-by: Emanoil Kotsev <deloptes@gmail.com>
(cherry picked from commit f26592c412)

libkcal/versit/vcc.c

@@ -2264,6 +2264,7 @@ static char* lexGetQuotedPrintable()
 		    /* single '=' follow by LINESEP is continuation sign? */
 		    if (next[0] == '\n') {
 			++mime_lineNum;
+			lexSkipWhite();
 			}
 		    else {
 			lexPushLookaheadc('=');

libkcal/versit/vcc.y

@@ -1000,6 +1000,7 @@ static char* lexGetQuotedPrintable()
 		    /* single '=' follow by LINESEP is continuation sign? */
 		    if (next[0] == '\n') {
 			++mime_lineNum;
+			lexSkipWhite();
 			}
 		    else {
 			lexPushLookaheadc('=');