Revert "utils.h: require a semi colon after OSMO_ASSERT"

This reverts commit 4e284b637943980a405a8c44f2712b749ded428f.

Unfortunately, some projects such as OsmoMSC, OsmoBTS and OpenBSC
do contain OSMO_ASSERT statements without a semi colon. Thus,
this change causes compilation errors when building them.

Please note that only the OSMO_ASSERT's definition is reverted,
while changes to other files (adding missing semicolons) are kept.

Change-Id: I6da4d7397d993f6c1af658cb5ae1e49c92a1b350
diff --git a/include/osmocom/core/utils.h b/include/osmocom/core/utils.h
index 8585a6a..601bb56 100644
--- a/include/osmocom/core/utils.h
+++ b/include/osmocom/core/utils.h
@@ -98,9 +98,9 @@
  *  the predicate evaluates to false (0).
  */
 #define OSMO_ASSERT(exp)    \
-	do if (!(exp)) { \
+	if (!(exp)) { \
 		osmo_panic("Assert failed %s %s:%d\n", #exp, __FILE__, __LINE__); \
-	} while(0)
+	}
 
 /*! duplicate a string using talloc and release its prior content (if any)
  * \param[in] ctx Talloc context to use for allocation