test: Silence MSVC warnings

MSVC does not notice non-returning functions (abort() / assert(0))
and warns about paths which end with them in non-void functions:

c:\cygwin\home\ranma42\code\fdo\pixman\test\fetch-test.c(114) :
warning C4715: 'reader' : not all control paths return a value
c:\cygwin\home\ranma42\code\fdo\pixman\test\stress-test.c(133) :
warning C4715: 'real_reader' : not all control paths return a value
c:\cygwin\home\ranma42\code\fdo\pixman\test\composite.c(431) :
warning C4715: 'calc_op' : not all control paths return a value

These warnings can be silenced by adding a return after the
termination call.

3 files changed, 3 insertions, 1 deletions

diff --git a/test/composite.c b/test/composite.c
index 08c6689d..a86e5ed6 100644
--- a/test/composite.c
+++ b/test/composite.c
@@ -426,6 +426,7 @@ calc_op (pixman_op_t op, double src, double dst, double srca, double dsta)
     case PIXMAN_OP_HSL_LUMINOSITY:
     default:
 	abort();
+	return 0; /* silence MSVC */
     }
 #undef mult_chan
 }
diff --git a/test/fetch-test.c b/test/fetch-test.c
index 314a0727..60bc765f 100644
--- a/test/fetch-test.c
+++ b/test/fetch-test.c
@@ -110,6 +110,7 @@ reader (const void *src, int size)
 	return *(uint32_t *)src;
     default:
 	assert(0);
+	return 0; /* silence MSVC */
     }
 }
 
diff --git a/test/stress-test.c b/test/stress-test.c
index bcbc1f86..166dc6d2 100644
--- a/test/stress-test.c
+++ b/test/stress-test.c
@@ -128,7 +128,7 @@ real_reader (const void *src, int size)
 	return *(uint32_t *)src;
     default:
 	assert (0);
-	break;
+	return 0; /* silence MSVC */
     }
 }