A pile of inits are not initialized. But most importantly, ymin is not initialized

From: Erik Hovland <erik@hovland.org>

and could potentially be tested without having been filled if the sscanf
is given a bogus string.
---

 filters/adjust/filter_adjust.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/filters/adjust/filter_adjust.c b/filters/adjust/filter_adjust.c
index 8cbbdef..52215ce 100644
--- a/filters/adjust/filter_adjust.c
+++ b/filters/adjust/filter_adjust.c
@@ -238,7 +238,7 @@ newAdjustFilter (VideoFrameType inpixfmt, VideoFrameType outpixfmt,
                  int *width, int *height, char *options)
 {
     ThisFilter *filter;
-    int numopts, ymin, ymax, cmin, cmax;
+    int numopts = 0, ymin = -1, ymax = -1, cmin = -1, cmax = -1;
     float ygamma, cgamma;
     (void) width;
     (void) height;
@@ -251,7 +251,6 @@ newAdjustFilter (VideoFrameType inpixfmt, VideoFrameType outpixfmt,
         return NULL;
     }
 
-    numopts = 0;
     if (options)
         numopts = sscanf(options, "%d:%d:%f:%d:%d:%f", &ymin, &ymax, &ygamma,
                          &cmin, &cmax, &cgamma);