Fix potentially uninitialized value.

third_party/libtiff/0007-uninitialized-value.patch

Index: third_party/libtiff/0007-uninitialized-value.patch
diff --git a/third_party/libtiff/0007-uninitialized-value.patch b/third_party/libtiff/0007-uninitialized-value.patch
new file mode 100644
index 0000000000000000000000000000000000000000..f6e9806181c2247369197b2c6b574fe5fd6ca70e
--- /dev/null
+++ b/third_party/libtiff/0007-uninitialized-value.patch
@@ -0,0 +1,13 @@
+diff --git a/third_party/libtiff/tif_dirread.c b/third_party/libtiff/tif_dirread.c
+index 5ef3264..bc41021 100644
+--- a/third_party/libtiff/tif_dirread.c
++++ b/third_party/libtiff/tif_dirread.c
+@@ -4443,7 +4443,7 @@ TIFFFetchDirectory(TIFF* tif, uint64 diroff, TIFFDirEntry** pdir,
+ 	static const char module[] = "TIFFFetchDirectory";
+ 
+ 	void* origdir;
+-	uint16 dircount16;
++	uint16 dircount16 = 0;
+ 	uint32 dirsize;
+ 	TIFFDirEntry* dir;
+ 	uint8* ma;