Fix apply --recount handling of no-EOL line

If a patch modifies the last line of a file that previously had no
terminating '\n', it looks like

    -old text
    \ No newline at end of file
    +new text

Hence, a '\' line does not signal the end of the hunk.  This modifies
'git apply --recount' to take this into account.

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Acked-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-apply.c

@@ -919,7 +919,7 @@ static void recount_diff(char *line, int size, struct fragment *fragment)
 			newlines++;
 			continue;
 		case '\\':
-			break;
+			continue;
 		case '@':
 			ret = size < 3 || prefixcmp(line, "@@ ");
 			break;

t/t4100-apply-stat.sh

@@ -33,6 +33,8 @@ mode
 non git (1)
 non git (2)
 non git (3)
+incomplete (1)
+incomplete (2)
 EOF
 
 test_done

t/t4100/t-apply-8.expect

@@ -0,0 +1,2 @@
+ t/t4100-apply-stat.sh |    2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)

t/t4100/t-apply-8.patch

@@ -0,0 +1,11 @@
+diff --git a/t/t4100-apply-stat.sh b/t/t4100-apply-stat.sh
+index be837bb..0798c64 100755
+--- a/t/t4100-apply-stat.sh
++++ b/t/t4100-apply-stat.sh
+@@ -35,4 +35,4 @@ non git (2)
+ non git (3)
+ EOF
+ 
+-test_done
++test_done
+\ No newline at end of file

t/t4100/t-apply-9.expect

@@ -0,0 +1,2 @@
+ t/t4100-apply-stat.sh |    2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)

t/t4100/t-apply-9.patch

@@ -0,0 +1,11 @@
+diff --git a/t/t4100-apply-stat.sh b/t/t4100-apply-stat.sh
+index 0798c64..be837bb 100755
+--- a/t/t4100-apply-stat.sh
++++ b/t/t4100-apply-stat.sh
+@@ -35,4 +35,4 @@ non git (2)
+ non git (3)
+ EOF
+ 
+-test_done
+\ No newline at end of file
++test_done