[PATCH 1/6] Add some assert guard around gas finding code

[Anton Lundin]

The code would have leaved gasidx undefined if it doesn't find a correct
gas, so this asserts instead of using uninitialized variables as array
index.

Signed-off-by: Anton Lundin <glance at acc.umu.se>
---
 planner.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/planner.c b/planner.c
index 9e9ed47..a1954d0 100644
--- a/planner.c
+++ b/planner.c
@@ -4,6 +4,7 @@
  *
  * (c) Dirk Hohndel 2013
  */
+#include <assert.h>
 #include <unistd.h>
 #include <ctype.h>
 #include <string.h>
@@ -404,6 +405,7 @@ static struct gaschanges *analyze_gaslist(struct diveplan *diveplan, struct dive
 				i++;
 			}
 			gaschanges[i].depth = dp->depth;
+			gaschanges[i].gasidx = -1;
 			do {
 				if (dive->cylinder[j].gasmix.o2.permille == dp->o2 &&
 				    dive->cylinder[j].gasmix.he.permille == dp->he) {
@@ -412,6 +414,7 @@ static struct gaschanges *analyze_gaslist(struct diveplan *diveplan, struct dive
 				}
 				j++;
 			} while (j < MAX_CYLINDERS);
+			assert(gaschanges[i].gasidx != -1);
 		}
 		dp = dp->next;
 	}
-- 
1.8.3.2